The Scale and Reality of the World’s Largest Refugee Camps

Refugee camps are intended as temporary shelters for populations fleeing conflict, persecution, or disaster. However, as prolonged crises and complex political stalemates persist, several camps have evolved into sprawling, semi-permanent cities housing hundreds of thousands of people. These megacamps present staggering physical, logistical, and environmental realities that challenge conventional notions of emergency shelter. Understanding the physical settings of the world’s largest refugee camps is essential for humanitarian planners, architects, and policymakers alike. This article explores the scale, geography, design, and environmental pressures of these immense settlements, drawing on key examples from Africa and Asia.

Dadaab Refugee Camp Complex (Kenya)

Origin and Scale

The Dadaab complex, located in northeastern Kenya near the Somali border, originated in 1991 when Somalia descended into civil war. Comprising three main camps – Hagadera, Dagahaley, and Ifo – Dadaab has at times held over 400,000 registered refugees, though recent counts place the population nearer 250,000–300,000. It remains one of the largest refugee camps on the planet. The camp’s population fluctuates based on drought, conflict, and repatriation efforts, but a core group of long-term residents has been born and raised entirely within the camp boundaries.

Physical Setting and Climate

Dadaab occupies a semi-arid landscape with sparse acacia scrub and low rainfall (averaging 250–350 mm per year). The terrain is flat, sandy, and prone to dust storms. Water availability is a constant challenge: groundwater is deep, brackish, and requires treatment. The camp’s physical layout follows a grid of dusty roads that are impassable during the rainy season. The open plains mean that the camp is exposed to intense heat, with daytime temperatures regularly exceeding 40 °C (104 °F). The lack of natural shade and tree cover contributes to a harsh microclimate.

Infrastructure and Adaptations

Dadaab’s shelters have evolved from standard canvas tents to more durable semi-permanent structures – many built from local materials like mud brick, corrugated metal, and tarpaulins. The camp includes a network of schools, health clinics, and markets. However, the extended nature of the settlement has forced residents to innovate: shaded communal areas, rainwater harvesting systems, and windbreaks are common. The camp’s physical expansion is constrained by the surrounding arid wilderness and a designated buffer zone for security. For more on the urbanization of Dadaab, see UNHCR’s dedicated page on Dadaab.

Kutupalong Refugee Camp (Bangladesh)

Rapid Growth and Population Density

Kutupalong, in Bangladesh’s Cox’s Bazar district, is the world’s largest refugee camp by population density and sheer size. Established in the 1990s for Rohingya refugees, it exploded in scale after 2017 when over 700,000 people fled Myanmar’s military crackdown. Today, Kutupalong and its adjacent camps house roughly 900,000 individuals in an area of less than 25 square kilometers. This gives it a population density higher than that of many urban slums, with minimal space between shelters.

Hilly Terrain and Vulnerability

Unlike Dadaab’s flat plains, Kutupalong is built on undulating hills and valleys near the Bay of Bengal. Shelters cling to slopes that were once covered in forest. The terrain forces a chaotic maze of narrow paths, bamboo bridges, and steep staircases. The monsoon season turns these slopes into mudslides, which have caused fatalities and destroyed thousands of shelters. The natural drainage is poor, leading to flooding and waterborne disease outbreaks. The camp’s physical layout was not planned; it expanded organically, which complicates service delivery and emergency response.

Environmental Degradation and Terracing

The rapid deforestation of the region to provide firewood and construction poles has stripped the hillsides of vegetation. In response, humanitarian agencies and residents have developed terracing techniques to stabilize slopes and plant bamboo and grass to reduce erosion. The terracing adds an interesting physical feature to the camp: stepped clusters of tarpaulin-covered huts, often with small gardens. However, the overall environmental footprint is severe – thousands of acres of forest have been lost. More on the environmental impact can be found in this report from IOM on the Rohingya crisis.

Zaatari Refugee Camp (Jordan)

From Desert to De Facto City

Zaatari, located in northern Jordan near the Syrian border, opened in 2012 to accommodate Syrians fleeing civil war. It has since become a landmark of refugee self-sufficiency. With a population of roughly 80,000, Zaatari has transformed from a dusty desert outpost into an organized, sprawling town. The camp is laid out in 12 districts, with numbered blocks and main streets – one of the most famous being the “Champs-Élysées” shopping street, where refugees operate shops selling clothes, electronics, and food.

Climate and Construction

The physical setting is a flat, arid plain with extreme temperature swings – from near-freezing winter nights to summer highs above 40 °C. Shelters began as standard UNHCR tents, but most residents have upgraded to prefabricated caravans (containers) with metal roofs, which provide better insulation and durability. The camp’s grid layout includes extensive solar panel arrays that power streetlights and community facilities. One notable physical adaptation is the installation of “desert coolers” – evaporative cooling systems that lower indoor temperatures by up to 10 °C.

Water Management and Street Planning

Jordan is one of the world’s most water-scarce countries. Zaatari receives a limited water supply, delivered by truck and stored in tanks. The camp’s streets are intentionally wide to allow tanker access and to reduce fire risk. Stormwater drainage channels and wastewater treatment plants have been built to mitigate the environmental impact. The linear, standardized layout stands in contrast to the organic growth of Kutupalong, offering lessons in planned emergency settlement design. For a deeper look at Zaatari’s transformation, the UNHCR Jordan page provides additional data.

Physical Design Principles in Refugee Camps

Grid vs. Organic Layouts

The world’s largest camps display two broad typologies: grid-based planned camps (like Zaatari) and spontaneous organic settlements (like early Kutupalong). Grid layouts offer easier navigation, service provision, and fire breaks, but can feel monotonous and may not suit all terrains. Organic layouts, while more adaptive to the physical site, create accessibility issues and complicate the distribution of aid. The best designs often incorporate a hybrid: a planned central spine with zones that allow for refugee-led modifications.

Use of Local Materials and Self-Building

In both Dadaab and Kutupalong, the influx of refugees has spurred the use of local building materials. Mud bricks, bamboo, jute, and reclaimed wood are common. This not only reduces logistic costs but also allows residents to personalize their shelters. However, these materials are less durable and require constant maintenance. Agencies now provide toolkits and construction training to help refugees build structures that are more resistant to weather and wear. The Global Shelter Cluster offers guidelines on these approaches.

Adaptation to Extreme Climates

Large camps in arid regions (e.g., Dadaab, Zaatari) must address extreme heat, dust, and water scarcity. Techniques include elevated shading structures, heat-reflective materials for roofs, and underground water storage. In tropical, monsoon-affected camps (e.g., Kutupalong and camps in East Africa’s Rift Valley), the priorities shift to drainage, slope stabilization, and mosquito control. The physical layout – orientation of shelters, spacing, and use of green buffers – can significantly affect microclimate and disease transmission.

Environmental Pressures and Sustainability Efforts

Deforestation and Soil Erosion

Every large camp demands firewood and construction timber, often from surrounding forests. Dadaab has denuded large areas within a 20‑km radius, forcing women to walk hours to collect fuel. Kutupalong’s hillsides lost dense forest cover, triggering landslides and loss of biodiversity. Reforestation and fuel‑efficient cookstoves are now central to environmental programs in these camps. For example, UNHCR’s “Clean Energy” initiative promotes solar cookers and briquettes made from agricultural waste.

Water Scarcity and Waste Management

Water is the most critical resource in camps like Dadaab and Zaatari. Groundwater depletion, contamination, and the cost of trucking water impose severe constraints. Many camps now use solar‑powered pumps and treat wastewater for agricultural use. Solid waste management is another challenge – plastic waste and human waste create pollution if not properly handled. Innovative projects such as converting waste into fuel and composting toilets are gaining traction. More on these efforts is available from UNEP’s reporting on refugee environments.

Long‑Term Environmental Recovery

When camps close or populations shrink, the environmental damage may persist for decades. Site rehabilitation – including replanting, erosion control, and removal of rubble – is often underfunded. However, in places like Tanzania’s Nyarugusu camp, which has hosted refugees from Burundi and DRC for decades, agroforestry projects have begun to restore the land while providing food and fuel. The physical legacy of megacamps is a growing concern for sustainable humanitarian action.

Social and Economic Geography of Camps

Markets and Informal Economies

Large camps develop their own internal economic geography. The main streets of Zaatari’s Champs‑Élysées host hundreds of businesses, from bakeries to car repair shops. Kutupalong’s “Görängö Market” is a bustling center of trade. These markets are often located near camp entrances or central squares, where foot traffic is highest. The physical layout shapes economic opportunity: camps with narrow, winding paths limit commerce, while planned grids encourage vibrant street‑level trade.

Social Segmentation and Spatial Segregation

Physical space in camps can also reflect social divisions – by ethnicity, clan, or arrival cohort. In Dadaab, for instance, Somali refugees from different regions often cluster in separate blocks. This spatial pattern can be both a coping mechanism and a source of tension. Humanitarian planners must consider these dynamics when allocating land and services. The physical setting – whether open plains or dense hillocks – influences how these social boundaries form and are maintained.

Schools, Health Clinics, and Public Spaces

The location of community facilities matters greatly. In large camps, children may have to walk 3–5 km to reach a school, across dusty roads or muddy slopes. Health clinics are often placed at the camp periphery to allow access from both the camp and the host community. Public spaces such as football fields, women’s centers, and religious buildings serve as focal points. Their physical design – shade, seating, lighting – can affect safety and usage, especially for women and girls.

Unique Physical Characteristics of Camps in Different Regions

African Camps: Dadaab, Kakuma, and Nyarugusu

Beyond Dadaab, other large African camps include Kakuma (Kenya) and Nyarugusu (Tanzania). Kakuma sits in a hot, arid valley on the border with South Sudan, with similar challenges to Dadaab but with slightly more water availability from the nearby Turkwell River. Nyarugusu is located in a humid, forested area of western Tanzania; its high rainfall (over 1,000 mm annually) requires extensive drainage and anti‑malarial measures. The contrast in physical settings highlights the need for site‑specific planning – what works in a desert does not work in a rainforest.

Asian Camps: Rohingya Camps and Myanmar’s IDP Sites

In addition to Kutupalong, the Bay of Bengal side of Bangladesh has several other camps on similar terrain. The physical challenges here are unique: high humidity, monsoon rainfall exceeding 3,000 mm, and a shallow water table. Inside Myanmar itself, internally displaced persons (IDP) camps in Rakhine State often occupy low‑lying land near rivers, vulnerable to both flooding and armed conflict. The physical setting is not just environmental but also political: the location of camps is often dictated by cease‑fire lines or restricted zones.

Middle Eastern Camps: Zaatari and Azraq

Jordan’s Azraq camp, opened in 2014, was designed from scratch as a “green camp” with solar‑powered cooling, communal gardens, and a modular layout. Its physical setting is an even harsher desert than Zaatari, leading to lower occupancy (second large Syrian camps) but better infrastructure per capita. Azraq’s physical design includes wide streets to reduce fire risk, prefabricated container homes, and solar arrays that provide electricity for 24 hours a day – a rarity in camp settings. This contrasts with the more improvised feel of Zaatari and offers a testing ground for future camp design.

Planning for the Future: Rethinking Physical Camps

From Temporary to Durable Solutions

The persistence of megacamps forces a rethinking of the “temporary” label. Many camps have existed for over 30 years. This has led to calls for treating camps as transitional settlements that can gradually integrate into surrounding regions. Physical upgrades such as permanent roads, piped water, and grid electricity are becoming necessary. However, such upgrades risk making camps permanent, which may conflict with the goal of voluntary repatriation or local integration. The physical setting – whether remote or near a city – strongly influences which path is viable.

Innovations in Shelter Design

New shelter designs emphasize modularity, ease of transport, and comfort. Examples include the Better Shelter (flat‑pack, metal‑frame, with solar panels) and the IKEA Foundation’s “refugee housing unit”. These are often tested in real camp conditions. The physical assembly requires flat, graded plots, which are not always available in hilly Kutupalong. Terrain‑specific designs, such as elevated bamboo platforms in flood‑prone areas, are gaining attention. Humanitarian organizations are also exploring 3D‑printed housing using local materials, but scalability remains an issue.

Co‑Location with Host Communities

Physical settings of camps are often deliberately isolated to contain refugees and reduce interaction with host communities. However, new models locate settlements near towns to facilitate economic integration and access to services. For example, the “Refugee and Migrant Integration” approach in Uganda places refugees on plots of land within host villages, blurring the line between camp and community. This dramatically changes the physical setting – from concentrated, fenced camps to dispersed, open settlements. The impact on land use and infrastructure is significant, and examples such as Uganda’s refugee response plan illustrate how physical integration can work.

Conclusion

The world’s largest refugee camps are far more than tents and tarpaulins – they are complex physical spaces shaped by climate, terrain, and human agency. From the dusty grids of Dadaab to the eroded slopes of Kutupalong and the emerging green designs of Azraq, each camp’s physical setting presents unique opportunities and constraints. Understanding these environments is crucial for designing better shelters, delivering services, and mitigating environmental damage. As forced displacement continues to grow, the physical footprints of these settlements will only become more permanent and more consequential. Humanitarian actors, host governments, and the refugees themselves must work together to create spaces that are not only survivable but also dignified and sustainable over the long term.