Climate Extremes and the Frequency of Natural Disasters

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Climate extremes represent some of the most pressing challenges facing our planet today. Extreme weather reached dangerous new heights in 2024, with record-breaking temperatures fueling unrelenting heatwaves, drought, wildfire, storms and floods that killed thousands of people and forced millions from their homes. Understanding the intricate relationship between climate change and the increasing frequency and intensity of natural disasters is essential for developing effective strategies to protect communities, ecosystems, and economies worldwide.

For the 2015–2024 decade average, observed warming relative to 1850–1900 was 1.24 °C, and this warming is fundamentally altering weather patterns across the globe. According to NOAA’s 2024 Annual Climate Report the combined land and ocean temperature has warmed at an average rate of 0.36 degrees Fahrenheit per decade since 1975. This accelerated warming is not merely a statistical observation—it translates directly into more frequent and severe weather extremes that impact billions of people.

The Alarming Increase in Climate Extremes

The evidence for increasing climate extremes has become overwhelming in recent years. Warmer temperatures are the main driver of more frequent and intense extreme weather events like tropical cyclones, floods, and droughts around the world, which in 2024 led to the highest number of new displacements recorded for the past 16 years, with a total of 605 extreme weather events occurring globally. This represents a dramatic escalation in the frequency of dangerous weather phenomena.

Of these events, 148 were classified as “unprecedented” and 289 as “unusual.” The sheer number of extraordinary weather events underscores how rapidly our climate system is changing. Globally, climate change added on average 41 additional days of dangerous heat in 2024 that threatened people’s health. These additional heat days represent a significant burden on public health systems, agricultural productivity, and energy infrastructure.

The human toll of these climate extremes is staggering. Climate change contributed to the deaths of at least 3,700 people and the displacement of millions in 26 weather events studied in 2024. However, this figure represents only a fraction of the total impact. It’s likely the total number of people killed in extreme weather events intensified by climate change this year is in the tens, or hundreds of thousands.

Types of Climate Extremes and Their Characteristics

Climate extremes encompass a wide range of weather phenomena that deviate significantly from historical norms. Each type of extreme presents unique challenges and impacts different regions and populations in distinct ways. Understanding these various forms of climate extremes is crucial for developing targeted adaptation and mitigation strategies.

Heatwaves and Temperature Extremes

It is an established fact that human-induced greenhouse gas emissions have led to an increased frequency and/or intensity of some weather and climate extremes since pre-industrial time, in particular for temperature extremes. Heatwaves represent one of the most direct and measurable impacts of climate change on extreme weather.

One of the indices showing the most dramatic change over time is the increase in the number of warm days, which is derived from changes in the daily maximum temperature, while at the same time, the number of cold nights has decreased, marking a shift in the whole distribution of daily temperatures. This shift in temperature distribution means that record-breaking heat is becoming increasingly common, while cold extremes are becoming rarer.

The health impacts of extreme heat are particularly severe. The countries that experienced the highest number of dangerous heat days are overwhelmingly small island and developing states, who are highly vulnerable and considered to be on the frontlines of climate change. These vulnerable populations often lack the infrastructure and resources necessary to cope with prolonged heat exposure, leading to increased mortality and morbidity.

Very high to severe humid-heat days are becoming more frequent, with many regions experiencing days above humid-heat thresholds that are considered to be moderately-high, high, very high and severe. Humid heat is particularly dangerous because it impairs the body’s ability to cool itself through perspiration, making it more difficult for people to survive extreme temperatures.

Heavy Rainfall and Flooding Events

Extreme precipitation events have become one of the most visible and destructive manifestations of climate change. Record-breaking global temperatures in 2024 translated to record-breaking downpours, with the last 12 months marked by a large number of devastating floods from Kathmandu, to Dubai, to Rio Grande do Sul, to the Southern Appalachians.

Of the 16 floods studied, 15 were driven by climate change-amplified rainfall, reflecting the basic physics of climate change — a warmer atmosphere tends to hold more moisture, leading to heavier downpours. This fundamental physical relationship means that as global temperatures continue to rise, we can expect even more intense rainfall events in the future.

The wettest day of the year is getting wetter. This trend has profound implications for flood risk management, as infrastructure designed for historical rainfall patterns may be inadequate for the more intense precipitation events we now face. Urban drainage systems, dams, and flood control structures are increasingly being overwhelmed by rainfall intensities that exceed their design specifications.

Floods impact more people worldwide than any other disaster, and the economic, social, and environmental impacts are getting worse. The cascading effects of flooding extend far beyond immediate property damage, disrupting supply chains, contaminating water supplies, spreading disease, and displacing communities for extended periods.

Hurricanes and Tropical Cyclones

Tropical cyclones represent some of the most powerful and destructive weather phenomena on Earth, and climate change is influencing their behavior in multiple ways. More water vapor in the atmosphere has exacerbated extreme rainfall and flooding, and the warming oceans have affected the frequency and extent of the most intense tropical storms.

Human-caused climate change increased the intensity for all of the Atlantic hurricanes in 2024. This intensification effect means that storms are reaching higher categories more quickly and maintaining their strength longer, even after making landfall. The 2024 hurricane season provided stark examples of this trend.

Hurricanes Helene and Milton, which struck the USA in rapid succession in September and October respectively, were the most destructive disasters of 2024, with Helene resulting in the largest overall losses from natural disasters in 2024 at US$ 56bn. Leading to at least 225 deaths, Helene was the deadliest Atlantic hurricane since Maria (2017), and the deadliest U.S. mainland hurricane since Katrina (2005).

A World Weather Attribution analysis found that Helene’s rainfall was ~10% heavier due to climate change. While a 10% increase might seem modest, it can make the difference between manageable flooding and catastrophic inundation, particularly in mountainous regions where rainfall runoff is concentrated.

Droughts and Water Scarcity

Droughts represent a slower-onset but equally devastating form of climate extreme. The worsening of droughts in some regions has high confidence among climate scientists. Unlike sudden-onset disasters like hurricanes or floods, droughts develop gradually and can persist for years, creating cumulative impacts that devastate agriculture, ecosystems, and water supplies.

Most studies found that climate change played a bigger role than El Niño in fueling events, including the historic drought in the Amazon. This finding is particularly significant because it demonstrates that climate change is now the dominant driver of many extreme events, overshadowing natural climate variability.

A billion-dollar drought affected the western U.S. in 2025, primarily driven by heat, rather than by a lack of precipitation, consistent with an emerging trend of heat-driven drought in the western U.S. This shift toward heat-driven drought represents a new challenge for water resource management, as traditional drought indicators based primarily on precipitation may underestimate the severity of water stress.

Wildfires and Fire Weather

Wildfires have become increasingly severe and widespread as climate change creates conditions more conducive to fire ignition and spread. Wildfires are growing in scale, frequency, and intensity, wreaking devastating consequences on an ever-larger number of communities.

With climate change intensifying, hotter temperatures, more intense and longer dry seasons, earlier snowmelt, and stronger winds damage nature’s ability to resist fire. These factors combine to create what meteorologists call “fire weather”—conditions that promote rapid fire spread and extreme fire behavior.

In January 2025, Los Angeles was devastated by wildfires that caused 31 deaths, destroyed over 16,000 homes and businesses, and were the most costly event of 2025 and the country’s most costly wildfires on record, with $61.2 billion in damages, about twice as costly as the previous record wildfire. This catastrophic event illustrates how climate-driven fire risk is increasingly threatening major urban areas, not just remote wildlands.

The connection between human-caused climate change and increasing extreme weather is no longer a matter of speculation—it is supported by robust scientific evidence from multiple lines of research. Attribution science has made remarkable advances in recent years, allowing scientists to quantify the role of climate change in specific extreme weather events.

Evidence of observed changes in extremes and their attribution to human influence (including greenhouse gas and aerosol emissions and land-use changes) has strengthened since AR5, in particular for extreme precipitation, droughts, tropical cyclones and compound extremes (including dry/hot events and fire weather). This strengthening evidence base provides increasing confidence in our understanding of how climate change influences extreme weather.

Some recent hot extreme events would have been extremely unlikely to occur without human influence on the climate system. In some cases, attribution studies have found that certain extreme heat events would have been virtually impossible in the absence of human-caused warming, representing truly novel climate conditions with no historical precedent.

Physical Mechanisms Driving Increased Extremes

Several fundamental physical processes explain why climate change leads to more frequent and intense extreme weather events. Understanding these mechanisms helps explain why certain types of extremes are increasing and provides a basis for projecting future changes.

The indicators show that human activities are increasing the Earth’s energy imbalance and driving faster sea-level rise compared to the AR6 assessment. This energy imbalance means that the Earth system is accumulating heat, which must be redistributed through atmospheric and oceanic circulation, often manifesting as more intense weather events.

The Clausius-Clapeyron relationship, a fundamental principle of atmospheric physics, dictates that warmer air can hold approximately 7% more water vapor for each degree Celsius of warming. This increased atmospheric moisture content provides more fuel for intense precipitation events and contributes to the intensification of tropical cyclones. It also means that when conditions are favorable for precipitation, the resulting rainfall can be significantly heavier than in a cooler climate.

Changes in atmospheric circulation patterns also play a crucial role. As the Arctic warms faster than lower latitudes—a phenomenon known as Arctic amplification—the temperature gradient between the poles and the equator weakens. This can affect the behavior of the jet stream, potentially leading to more persistent weather patterns that can prolong heat waves, droughts, or rainy periods.

The Role of Natural Variability

While climate change is driving long-term trends in extreme weather, natural climate variability continues to play an important role in individual events. Many extreme events that took place in the beginning of 2024 were influenced by El Niño, however, most studies found that climate change played a bigger role than El Niño in fueling these events, consistent with the fact that, as the planet warms, the influence of climate change increasingly overrides other natural phenomena affecting the weather.

This interaction between climate change and natural variability means that extreme events often result from a combination of factors. El Niño, La Niña, the Pacific Decadal Oscillation, the Atlantic Multidecadal Oscillation, and other modes of natural climate variability continue to influence weather patterns, but they now operate on top of a warmer baseline created by human-caused climate change.

Impact on Natural Disasters: Economic and Human Costs

The increasing frequency and intensity of climate extremes is translating directly into rising disaster losses, both in economic terms and human suffering. The financial burden of climate-related disasters has reached unprecedented levels, straining insurance systems, government budgets, and household finances.

Economic Losses from Climate Disasters

Worldwide, natural disasters caused losses of US$ 320bn in 2024, of which around US$ 140bn were insured, with overall losses and insured losses considerably higher than the inflation-adjusted averages of the past ten and 30 years. These figures represent a significant escalation in disaster costs, reflecting both the increasing severity of events and the growing exposure of valuable assets to climate hazards.

In the United States alone, the economic impact has been staggering. The U.S. experienced 24 billion-dollar weather and climate disasters from January through November 2024, resulting in an estimated 418 deaths and $61 billion in damages. However, these totals do not include damages associated with Hurricanes Helene or Milton, which may add a stark $100 billion or more to this figure, potentially surpassing the $95 billion combined disaster costs in 2023.

Through November, the average time between billion-dollar disasters in 2024 was just 12 days — a striking decrease from an average of 82 days between disasters in the early 1980s. This dramatic compression of time between major disasters creates compounding challenges for emergency response, recovery, and rebuilding efforts.

An analysis by non-profit Christian Aid revealed that the 10 costliest climate disasters of 2024 caused more than $229 billion in damages, with all of them being water-related events, including floods and storms. The dominance of water-related disasters underscores the critical role of the hydrological cycle in climate change impacts.

Human Displacement and Migration

Beyond economic costs, climate extremes are displacing millions of people from their homes, creating humanitarian crises and potentially contributing to long-term migration patterns. Some 824,500 were displaced and around 1,700 people were killed as a result of extreme weather events in 2024, while 1.1 million people were reportedly injured.

This pattern of human displacement is expected to rise alongside the escalation of intense rainfall, flooding, tropical cyclones, droughts, and the growing impact of rising sea levels, with scientists estimating that there could be 1.2 billion climate refugees by 2050. This projection represents one of the most significant humanitarian challenges of the coming decades.

Displacement from climate disasters disproportionately affects vulnerable populations who have the least capacity to adapt or relocate. Communities in low-lying coastal areas, river floodplains, and drought-prone regions face repeated displacement, creating cycles of vulnerability that are difficult to break. The loss of homes, livelihoods, and community ties has profound psychological and social impacts that extend far beyond the immediate disaster period.

Mortality and Health Impacts

While improved early warning systems and disaster preparedness have helped reduce mortality from some types of disasters, climate extremes continue to claim thousands of lives each year. Around 11,000 people lost their lives as a result of natural disasters in 2024.

Heat-related mortality is of particular concern as temperatures continue to rise. As the world’s fastest-warming continent, heat-related mortality in Europe has already increased by around 30% in the past two decades, coinciding with a rise in the average temperature. A 2024 study concluded that heat-related deaths in Europe could triple by the end of the century unless ambitious adaptation measures are implemented continent-wide.

Beyond direct mortality, climate extremes contribute to a wide range of health impacts including injuries, infectious disease outbreaks, mental health problems, and exacerbation of chronic conditions. Flooding can contaminate water supplies and create breeding grounds for disease vectors. Droughts can lead to malnutrition and food insecurity. Wildfires produce smoke that affects air quality over vast areas, triggering respiratory and cardiovascular problems.

Disproportionate Impacts on Vulnerable Populations

Climate extremes do not affect all populations equally. More than 91 per cent of the deaths from weather, climate and water extremes occurred in developing countries. This stark disparity reflects differences in exposure, vulnerability, and adaptive capacity between wealthy and poor nations.

Within countries, certain populations face heightened risks. The elderly, children, people with disabilities, outdoor workers, and those living in informal housing or experiencing homelessness are particularly vulnerable to extreme heat and other climate hazards. Low-income communities often live in areas with greater exposure to floods, heat islands, or other climate risks, and have fewer resources to prepare for, respond to, or recover from disasters.

This inequality in climate impacts raises important questions of climate justice. Many of the communities most affected by climate extremes have contributed least to the greenhouse gas emissions driving climate change, yet they bear a disproportionate burden of the consequences.

Factors Contributing to Increased Frequency of Climate Extremes

The rising frequency and severity of climate extremes results from a complex interplay of factors, with human-caused climate change as the primary driver. Understanding these contributing factors is essential for developing effective strategies to reduce future risks.

Rising Global Temperatures

Earth’s average surface temperature has been rising because human-produced greenhouse gases are causing Earth to absorb more energy than it radiates back to space. This fundamental energy imbalance is the root cause of global warming and the associated changes in extreme weather.

The rate of warming has accelerated in recent decades, with the combined land and ocean temperature warming more than three times faster since 1975 than the longer-term average since 1850. This acceleration means that the climate is changing more rapidly than many natural and human systems can adapt.

Even relatively small incremental increases in global warming (+0.5°C) cause statistically significant changes in extremes on the global scale and for large regions. This sensitivity of extremes to temperature changes means that every fraction of a degree of warming matters for disaster risk.

Changes in Atmospheric and Oceanic Circulation

Global warming is not just about higher average temperatures—it is fundamentally altering the circulation patterns that govern weather and climate. Changes in the jet stream, monsoon systems, and ocean currents can shift precipitation patterns, alter storm tracks, and create conditions favorable for persistent extreme weather.

Ocean warming is particularly important for tropical cyclone development and intensification. Warmer sea surface temperatures provide more energy to fuel storms, while changes in ocean heat content affect how quickly storms can intensify. The warming of the upper ocean also affects the depth of warm water available to sustain storms, potentially allowing them to maintain intensity longer.

Human Activities and Land Use Changes

Beyond greenhouse gas emissions, other human activities contribute to disaster risk. Much of population growth and property development has continued in high-risk areas like coasts, the fire-prone wildland-urban interface in the West, and river floodplains, meaning that more people and property are at risk and contribute to larger losses.

Urbanization can exacerbate climate extremes through the urban heat island effect, which makes cities significantly warmer than surrounding rural areas. Impervious surfaces like pavement and buildings prevent water infiltration, increasing flood risk. Deforestation and land degradation reduce the landscape’s ability to absorb rainfall and regulate water flow, amplifying both flood and drought risks.

Agricultural practices, water management decisions, and infrastructure development all influence how climate extremes manifest and what impacts they have. Unsustainable groundwater extraction can worsen drought impacts. Channelization of rivers can increase downstream flood risk. Poor building codes and inadequate infrastructure maintenance can amplify disaster losses.

Compound and Cascading Risks

The increase in disasters creates ‘compound extremes’ which are an increasing problem for recovery, with climate change increasing the risk of multiple extremes occurring simultaneously in different locations that are connected by complex human and natural systems. These compound events can overwhelm response capacity and create cascading failures across interconnected systems.

For example, drought can increase wildfire risk, and wildfires can alter landscapes in ways that increase subsequent flood and landslide risk. Heat waves can coincide with droughts to create severe agricultural impacts. Multiple hurricanes in rapid succession can strain emergency response resources and complicate recovery efforts. Understanding and preparing for these compound risks represents a major challenge for disaster risk management.

Regional Variations in Climate Extremes

While climate change is a global phenomenon, its impacts on extreme weather vary significantly by region. Different parts of the world face distinct combinations of climate hazards based on their geography, climate zones, and exposure to various weather systems.

North America

North America has experienced a dramatic increase in billion-dollar disasters in recent years. The past three years rank highest for the annual number of billion-dollar disasters: 2023 (28 events), 2024 (27 events), and 2025 (23 events). This clustering of high-impact years suggests a fundamental shift in the disaster landscape.

The United States faces diverse climate hazards across its vast geography. The Gulf Coast and Atlantic seaboard face increasing hurricane risk. The western states contend with intensifying droughts, heat waves, and wildfires. The central plains experience severe thunderstorms and tornadoes. Coastal areas face sea level rise and storm surge. The number of billion-dollar severe storms set a new record in 2025, with 21 such events, reflecting near-record numbers of damaging high wind and tornado reports during the spring and summer.

For Canada, the losses from natural disasters in 2024 were the highest ever since 1980, with overall losses of US$ 10bn, driven in large part by a severe hailstorm that hit Calgary, flooding from Hurricane Debby, and a severe wildfire in Jasper National Park. These diverse impacts illustrate how climate change is affecting multiple types of hazards across the country.

Europe

While no continent was spared by extreme weather last year, Europe bore the most brunt with 188 events, mostly heatwaves, followed by rain spells and floods. The concentration of heat-related events in Europe reflects the continent’s rapid warming and vulnerability to temperature extremes.

European heat waves have become more frequent, intense, and prolonged. Mediterranean regions face increasing drought and wildfire risk. Northern Europe is experiencing more intense rainfall and flooding. Alpine regions are seeing rapid glacier retreat and changes in snow patterns that affect water resources and natural hazard risks.

The 2022 European heat wave provided a stark example of the deadly potential of extreme heat. Attribution studies found that climate change made the event significantly more likely and intense, contributing to thousands of excess deaths across the continent.

Latin America and the Caribbean

In principal component analysis of Latin America and the Caribbean, two factors emerged: component 1 hydrological events (floods, droughts, storms and landslides) most affecting Brazil, Mexico, Colombia, Guatemala and Haiti, and component 2 thermal phenomena (extreme temperatures and forest fires) most affecting Chile, Peru, Bolivia and Argentina.

In Southern Brazil, extreme rainfall in late April and early May led to severe flooding, with almost the entire federal state of Rio Grande do Sul affected in one of the worst floods in Brazil in recent decades, with damage estimated at around US$ 7bn. This event demonstrated the vulnerability of the region to extreme precipitation.

Small island developing states in the Caribbean face particular vulnerability to hurricanes, sea level rise, and coastal flooding. These nations often have limited resources for disaster preparedness and recovery, making them especially vulnerable to climate extremes despite contributing minimally to global greenhouse gas emissions.

Asia and the Pacific

Asia faces some of the most severe impacts from climate extremes, with large populations exposed to multiple hazards. Monsoon regions are experiencing changes in rainfall patterns, with some areas seeing more intense rainfall and others facing increased drought risk. Tropical cyclones in the western Pacific and Indian Ocean affect millions of people in coastal areas.

South and Southeast Asia are particularly vulnerable to flooding, with dense populations in river deltas and coastal areas. Heat waves are becoming more severe across the region, with dangerous combinations of heat and humidity threatening public health. Himalayan regions face risks from glacier retreat, changing snow patterns, and glacial lake outburst floods.

Small island nations in the Pacific face existential threats from sea level rise and tropical cyclones. Some low-lying islands may become uninhabitable within decades if current trends continue, raising profound questions about climate-induced migration and loss of territory.

Africa

Africa faces severe and diverse climate impacts despite contributing minimally to historical greenhouse gas emissions. The continent experiences droughts, floods, heat waves, and tropical cyclones, often with devastating humanitarian consequences due to limited adaptive capacity.

The Horn of Africa has experienced severe droughts that have created food insecurity for millions. The Sahel region faces increasing aridity and desertification. Southern Africa experiences both droughts and floods, sometimes in rapid succession. Coastal areas face risks from sea level rise and storm surge.

Limited weather monitoring infrastructure in parts of Africa creates challenges for understanding and predicting climate extremes. Investment in climate services, early warning systems, and disaster preparedness is critical for reducing vulnerability across the continent.

Future Projections and Scenarios

Understanding how climate extremes may change in the future is essential for long-term planning and adaptation. Climate models provide projections of how different types of extremes may evolve under various greenhouse gas emission scenarios.

Temperature Extremes

The occurrence of extreme events unprecedented in the observed record will rise with increasing global warming, even at 1.5°C of global warming, with projected percentage changes in frequency higher for the rarer extreme events. This means that as warming continues, we will increasingly experience weather conditions that have no historical precedent.

Heat waves are projected to become more frequent, more intense, and longer-lasting across most land areas. What are currently considered extreme heat events may become routine summer conditions in many regions by mid-century. Nighttime temperatures are expected to increase even faster than daytime temperatures in many areas, reducing the relief that cooler nights currently provide during heat waves.

Cold extremes, while still occurring, are projected to become less frequent and less severe. However, the interaction between Arctic warming and mid-latitude weather patterns may create complex changes in winter weather that are still being researched.

Precipitation Extremes

The intensification of heavy precipitation has high confidence, including that associated with tropical cyclones. As the atmosphere continues to warm and hold more moisture, extreme precipitation events are expected to become more intense across most regions.

However, changes in total precipitation are more complex and vary by region. Some areas may experience both more intense rainfall events and longer dry periods between events—a pattern that increases both flood and drought risk. This “precipitation whiplash” can be particularly challenging for water resource management and agriculture.

Snowfall patterns are also changing, with more precipitation falling as rain rather than snow in many regions, earlier snowmelt, and reduced snowpack. These changes affect water availability, flood timing, and winter recreation, among other impacts.

Tropical Cyclones

While there is less certainty about changes in the total number of tropical cyclones, there is growing confidence that the proportion of intense storms (Category 4 and 5) will increase. Storms are also expected to produce heavier rainfall and potentially undergo more rapid intensification.

Sea level rise will exacerbate storm surge impacts from tropical cyclones, increasing coastal flood risk even if storm characteristics remain unchanged. The combination of more intense storms and higher sea levels creates compounding risks for coastal communities.

Some research suggests that tropical cyclones may track differently in a warmer climate, potentially affecting regions that have historically experienced fewer storms. However, there is still considerable uncertainty about these potential changes in storm tracks.

Droughts and Aridity

Drought projections show increasing risk in many regions, particularly in subtropical areas. The Mediterranean, southwestern North America, southern Africa, and parts of South America and Australia are among the regions projected to experience more frequent and severe droughts.

Rising temperatures increase evapotranspiration, meaning that even if precipitation remains constant, soil moisture and water availability may decline. This “atmospheric thirst” effect means that drought can develop more quickly and become more severe than in the past.

Some regions may experience increased precipitation but still face water stress due to changes in timing, increased evaporation, or growing water demand. Managing water resources in a changing climate will require adaptive strategies that account for these complex changes.

Compound and Cascading Events

Future projections suggest that compound events—situations where multiple hazards occur simultaneously or in sequence—will become more common. Heat waves and droughts may increasingly coincide, creating severe impacts on agriculture, water resources, and energy systems. The combination of drought and heat can also create extreme wildfire conditions.

Cascading impacts, where one extreme event triggers or exacerbates others, are also expected to increase. For example, wildfires can alter landscapes in ways that increase flood and landslide risk. Droughts can stress vegetation, making it more vulnerable to pest outbreaks or subsequent fires.

Adaptation and Risk Reduction Strategies

While reducing greenhouse gas emissions is essential for limiting future climate change, adaptation measures are necessary to manage the climate extremes that are already occurring and those that are locked in due to past emissions. Effective adaptation requires action at multiple scales, from individual households to international cooperation.

Early Warning Systems

Thanks to improved early warning systems and disaster management, the number of deaths decreased almost threefold between 1970 and 2019. This dramatic reduction in mortality demonstrates the life-saving potential of effective early warning systems.

Modern early warning systems integrate weather forecasting, hazard monitoring, risk assessment, and communication systems to provide timely alerts to at-risk populations. Advances in satellite technology, weather modeling, and communication networks have greatly enhanced the ability to predict and warn of impending disasters.

However, early warning systems are only effective if they reach vulnerable populations and if those populations have the capacity to take protective action. This requires investment in communication infrastructure, public education, and emergency preparedness planning. Special attention must be paid to reaching marginalized communities who may lack access to standard communication channels.

Infrastructure Resilience

Building and retrofitting infrastructure to withstand climate extremes is essential for reducing disaster losses. This includes strengthening buildings to resist high winds and earthquakes, elevating structures in flood-prone areas, improving drainage systems to handle intense rainfall, and designing roads and bridges to withstand extreme heat and flooding.

Critical infrastructure such as power plants, water treatment facilities, hospitals, and communication networks require special attention, as their failure during disasters can create cascading impacts. Redundancy and backup systems can help ensure that essential services continue during and after extreme events.

Green infrastructure—such as urban forests, wetlands, and permeable surfaces—can complement traditional gray infrastructure by providing multiple benefits including flood control, heat mitigation, and improved air quality. Nature-based solutions often provide co-benefits beyond disaster risk reduction, including habitat for wildlife and recreational opportunities.

Land Use Planning and Zoning

Avoiding development in high-risk areas is one of the most effective ways to reduce disaster losses. Floodplains, coastal zones, steep slopes, and wildfire-prone areas all present elevated risks that should inform land use decisions. Zoning regulations can restrict or prohibit development in the most hazardous locations.

For existing development in high-risk areas, managed retreat—the planned relocation of structures away from hazardous areas—may be necessary in some cases. While politically and socially challenging, managed retreat can be more cost-effective than repeatedly rebuilding in areas subject to recurrent disasters.

Land use planning should also consider how to maintain and restore natural features that provide protection from hazards. Coastal wetlands and mangroves buffer storm surge, forests reduce flood peaks and landslide risk, and urban green spaces mitigate heat island effects.

Water Resource Management

Adapting water management to changing precipitation patterns and increasing extremes requires flexible, integrated approaches. This includes diversifying water sources, improving water storage and distribution systems, enhancing water use efficiency, and protecting water quality.

Drought preparedness plans should include water conservation measures, restrictions on non-essential uses, and strategies for allocating limited water among competing demands. Flood management should balance structural measures like dams and levees with non-structural approaches like floodplain restoration and improved land management.

Integrated water resource management considers the full water cycle and the connections between surface water, groundwater, and water quality. It also recognizes that water management decisions in one location can affect water availability and flood risk elsewhere in a watershed.

Heat Action Plans

As heat waves become more frequent and severe, cities and regions are developing heat action plans to protect public health. These plans typically include systems for forecasting and warning of dangerous heat, identifying and reaching vulnerable populations, opening cooling centers, and coordinating emergency response.

Urban planning and design can reduce heat exposure through increased tree cover, reflective surfaces, and building design that promotes natural ventilation. Workplace policies may need to be adapted to protect outdoor workers from heat stress, including providing rest breaks, shade, and hydration.

Public education about heat risks and protective measures is essential, as many people underestimate the dangers of extreme heat. Special outreach to elderly individuals, people with chronic health conditions, and those without access to air conditioning can help prevent heat-related illness and death.

Ecosystem-Based Adaptation

Healthy ecosystems provide numerous services that help reduce disaster risk. Forests regulate water flow and reduce flood peaks, coastal ecosystems buffer storm surge and waves, and wetlands store floodwater and filter pollutants. Protecting and restoring these ecosystems can be a cost-effective adaptation strategy that provides multiple co-benefits.

Ecosystem-based adaptation is particularly valuable in contexts where traditional infrastructure is too expensive or where communities depend directly on ecosystem services for their livelihoods. However, it requires careful planning and management to ensure that ecosystems can continue to provide services as climate conditions change.

Climate change itself can stress ecosystems, potentially reducing their ability to provide protective services. Adaptation strategies should consider how to maintain ecosystem health and resilience in the face of changing conditions, which may include assisted migration of species, restoration of degraded areas, and reduction of non-climate stressors.

Financial Risk Management

Insurance and other financial mechanisms can help spread disaster risk and provide resources for recovery. However, rising disaster losses are straining insurance markets in some regions, leading to higher premiums, reduced coverage, or insurers withdrawing from high-risk areas.

Innovative financial instruments such as catastrophe bonds, parametric insurance, and disaster risk pools can provide additional options for managing financial risk. These mechanisms can provide rapid payouts after disasters, helping to speed recovery.

At the household level, emergency savings, insurance coverage, and diversified livelihoods can help families cope with disaster losses. Social safety nets and disaster assistance programs provide crucial support for those who lack the resources to recover on their own.

Building Adaptive Capacity

Ultimately, reducing vulnerability to climate extremes requires building the capacity of individuals, communities, and institutions to adapt to changing conditions. This includes education and awareness, access to information and resources, strong social networks, effective governance, and equitable development.

Community-based adaptation approaches that engage local knowledge and priorities can be particularly effective. When communities are involved in identifying risks and developing solutions, the resulting strategies are more likely to be appropriate, accepted, and sustained.

Building adaptive capacity also requires addressing underlying vulnerabilities such as poverty, inequality, and marginalization. Climate adaptation cannot be separated from broader development goals—sustainable development that reduces vulnerability and builds resilience is essential for managing climate risks.

The Role of Climate Mitigation

While adaptation is necessary to manage current and near-term climate risks, reducing greenhouse gas emissions remains essential for limiting the severity of future climate extremes. This exceptional year of extreme weather shows how dangerous life has already become with 1.3°C of human-induced warming, and highlights the urgency of moving away from planet-heating fossil fuels as quickly as possible.

Every increment of warming avoided reduces the frequency and intensity of climate extremes. The difference between 1.5°C, 2°C, and higher levels of warming is substantial in terms of disaster risk. Limiting warming to lower levels will save lives, reduce economic losses, and make adaptation more manageable.

Achieving deep emissions reductions requires transformation of energy systems, transportation, industry, agriculture, and land use. Renewable energy technologies, energy efficiency, electrification of transportation, sustainable agriculture, and forest protection all play important roles in climate mitigation.

The transition to a low-carbon economy presents both challenges and opportunities. While it requires significant investment and changes to existing systems, it also creates opportunities for innovation, job creation, improved air quality, and enhanced energy security. Many mitigation measures provide co-benefits that justify action even beyond climate considerations.

International cooperation is essential for effective climate mitigation, as greenhouse gases mix globally regardless of where they are emitted. The Paris Agreement provides a framework for countries to work together to limit warming, but much stronger action is needed to meet its goals. Developed countries have a particular responsibility to lead emissions reductions and provide support to developing countries for both mitigation and adaptation.

The Importance of Climate Services and Research

Continued investment in climate science, monitoring, and services is essential for understanding and responding to climate extremes. Weather and climate observations provide the foundation for early warnings, climate projections, and understanding of how the climate system is changing.

Climate models continue to improve, providing increasingly detailed projections of how climate extremes may change at regional and local scales. These projections inform long-term planning for infrastructure, water resources, agriculture, and other climate-sensitive sectors.

Attribution science—the field that determines the role of climate change in specific extreme events—has advanced rapidly in recent years. Rapid attribution studies can now be completed within days or weeks of an event, providing timely information about the climate change connection while the event is still fresh in public awareness.

Climate services—the provision of climate information in a form that supports decision-making—help translate scientific knowledge into practical applications. This includes seasonal forecasts for agriculture, climate projections for infrastructure planning, and risk assessments for insurance and finance.

Gaps in climate observations and services are particularly acute in many developing countries, where vulnerability to climate extremes is often highest. International support for strengthening climate monitoring networks, developing climate services, and building scientific capacity is a critical investment in global resilience.

Moving Forward: An Integrated Approach

Addressing the challenge of increasing climate extremes requires an integrated approach that combines emissions reductions, adaptation, disaster risk reduction, and sustainable development. These elements are interconnected and mutually reinforcing—progress in one area supports progress in others.

Climate action must be informed by the best available science while also incorporating local knowledge and priorities. It must address both immediate risks and long-term trends. It must be equitable, ensuring that vulnerable populations are protected and that the costs and benefits of climate action are fairly distributed.

Collaboration across sectors, scales, and disciplines is essential. Climate extremes affect every aspect of society, from health and agriculture to energy and transportation. Effective responses require coordination among government agencies, private sector actors, civil society organizations, and communities.

The window for limiting climate change to manageable levels is narrowing, but it has not closed. Every action to reduce emissions, build resilience, and protect vulnerable populations matters. The choices made in the coming years will determine the severity of climate extremes that future generations will face.

Today’s costly climate impacts reflect about 1.2°C of global warming, with every fraction of a degree of additional warming further intensifying these consequences, but well-established science shows that if we commit to rapid and sustained cuts in heat-trapping carbon pollution, we could set younger generations on a path toward a far safer future with reduced climate warming and fewer risky extreme events.

The increasing frequency and intensity of climate extremes represents one of the most significant challenges of our time. The scientific evidence is clear: human-caused climate change is making extreme weather more dangerous, and the impacts are already being felt around the world. However, we have the knowledge, technology, and resources needed to address this challenge. What is required now is the political will, social commitment, and sustained action to build a more resilient and sustainable future.

Additional Resources and Information

For those seeking to learn more about climate extremes and natural disasters, numerous authoritative resources are available. The Intergovernmental Panel on Climate Change (IPCC) provides comprehensive assessments of climate science, including detailed chapters on extreme events. The NOAA Climate.gov website offers accessible information about climate change and its impacts, including tracking of billion-dollar disasters in the United States.

The World Weather Attribution initiative conducts rapid attribution studies of extreme events, providing timely analysis of the role of climate change in specific disasters. The Climate Central organization produces research and communications on climate change impacts, including extensive resources on extreme weather and climate disasters.

National meteorological services, climate research institutions, and international organizations such as the World Meteorological Organization provide ongoing monitoring and analysis of climate extremes. Staying informed about the latest science and engaging with climate action at individual, community, and societal levels are essential steps toward building resilience in the face of increasing climate extremes.

The challenge of climate extremes and natural disasters is daunting, but it is not insurmountable. Through a combination of emissions reductions, adaptation measures, improved disaster preparedness, and equitable development, we can reduce risks and build a safer, more sustainable future for all. The time to act is now.