Climate, multi-hazard disaster risk and vulnerabilities of Equatorial Guinea
Overall risk profile: Equatorial Guinea’s disaster risk is dominated by hydrometeorological hazards—river floods, urban/pluvial floods, flash floods, intense rainfall, storms, coastal flooding and erosion—combined with high landslide susceptibility and a distinctive volcanic risk profile on Bioko Island, where Malabo is located. Drought and water scarcity are not the dominant national hazard, but seasonal dry spells, rainfall variability, heat stress and food-system dependence create important climate vulnerabilities, particularly for smallholder agriculture, coastal settlements, health, transport, drainage, and critical infrastructure.
1. Climate context
Equatorial Guinea has a humid equatorial tropical climate with high temperatures, high humidity and heavy rainfall. The country consists of a continental mainland, Río Muni, and island territories including Bioko, Annobón, Corisco and the Elobey islands. The mainland has low coastal plains that rise inland into hills and valleys, while Bioko is volcanic and mountainous, creating strong local rainfall and landslide gradients. Average temperatures generally range from 23°C to 25°C, with limited seasonal variation but cooler conditions at higher elevations. The main wet season is broadly April to October, influenced by the West African monsoon, with coastal areas receiving roughly 250–400 mm of rainfall per month during the wettest periods and inland areas receiving about 150–250 mm per month. (Adaptation UNDP)
This geography creates two different but connected risk environments: coastal and urban flood risk around Malabo, Bata, Luba and low-lying coastal areas; and terrain-related risk in volcanic and steep-slope landscapes, especially Bioko and hilly inland zones. More than 45% of national territory is tropical forest, which makes ecosystem degradation, forest loss, slope disturbance and catchment degradation important drivers of flood, landslide and biodiversity risk. (Adaptation UNDP)
2. Main hazard profile
| Hazard | Risk level and mechanism | Main vulnerable areas and impacts |
|---|---|---|
| River flooding | Classified as high; potentially damaging and life-threatening river floods are expected at least once in 10 years. Flood risk varies sharply by floodplain location, small streams, drainage conditions and local topography. (Think Hazard) | River valleys, floodplains, low-lying inland settlements, roads, bridges, schools, health posts, farms and market routes. |
| Urban / pluvial flooding | Classified as high; intense rainfall can exceed drainage capacity, particularly in dense urban areas with impermeable surfaces and weak stormwater systems. (Think Hazard) | Malabo, Bata, Luba and other built-up areas; impacts include road blockage, damage to housing, drainage overflow, contamination of water sources and disruption to services. |
| Coastal flooding / storm surge / sea-level rise | Classified as medium, meaning more than a 20% chance of potentially damaging coastal flood waves in the next 10 years. (Think Hazard) | Coastal settlements, ports, roads, tourism assets, low-lying infrastructure, mangroves, fisheries landing sites and shoreline communities. |
| Landslides and mudflows | Classified as high; rainfall, steep slopes, geology, soils, land cover and possible seismic triggers make localized landslides a frequent hazard phenomenon. (Think Hazard) | Bioko volcanic slopes, highland roads, cut slopes, informal hillside settlements, pipelines, power lines and transport corridors. |
| Volcanic hazard | Classified as high; parts of the country are within 50 km of volcanoes with damaging eruptions recorded in the past 2,000 years. Bioko is a volcanic island with three coalescent shield volcanoes; its last eruption occurred in 1923, and current CO₂ emissions indicate magma at depth and future activity potential. (Think Hazard) | Bioko Island, including areas around Malabo, Pico Basilé and Gran Caldera de Luba; risks include lava flows, ash, gases, lahars, landslide-volcano interactions and evacuation challenges. |
| Extreme heat | Classified as medium; there is more than a 25% chance of at least one prolonged heat-stress episode in the next five years, with future warming expected to make heat extremes more frequent. (Think Hazard) | Outdoor workers, urban poor, elderly people, children, health facilities, schools, markets, construction workers, farmers and transport workers. |
| Drought / dry spells | National water-scarcity hazard is assessed as very low, but droughts and dry spells remain relevant to agriculture and food security because rainfall variability affects cropping calendars, yields and water availability. (Think Hazard) | Rainfed farms, rural livelihoods, food markets, cassava, plantain, banana, cocoa, coconut, coffee and palm-oil value chains. |
| Earthquake and tsunami | Earthquake hazard is medium and tsunami hazard low in ThinkHazard’s national screening. These are secondary risks but relevant for coastal and volcanic-island infrastructure planning. (Think Hazard) | Bioko, coastal infrastructure, ports, dense settlements and critical facilities. |
3. Exposure and vulnerability drivers
Urban concentration and drainage vulnerability are central risk drivers. High rainfall combined with steep slopes, undersized drainage, unplanned settlement expansion, impermeable surfaces and weak solid-waste management can convert intense rainfall into rapid urban flooding. In Malabo and Bata, the most serious risk is often not only rainfall volume but the interaction of rainfall with blocked drains, road design, coastal backwater effects, poor siting of settlements and inadequate stormwater infrastructure.
Bioko Island has a compound risk profile. It combines volcanic terrain, steep slopes, high rainfall, erosion, landslides, coastal exposure and dense administrative/economic assets around Malabo. A 2024 volcanic-hazard study found that high precipitation is a main landslide trigger on Bioko and identified highly susceptible areas along the Gran Caldera de Luba, Pico Biaó and Pico Basilé flanks. (Research Discovery)
Food-system vulnerability is significant despite the country’s agricultural potential. UNDP/FAO notes that agriculture and fisheries contribute only around 2% of GDP, while agriculture covers only about 30% of national production and the country imports more than 80% of its food. Cultivated land includes basic food crops such as cassava, sweet potatoes, plantain, peanuts and bananas, alongside commercial crops such as cocoa, coffee, coconut and palm oil. This means climate shocks can affect both domestic production and import-dependent food prices. (Adaptation UNDP)
Low readiness and institutional capacity constraints intensify risk. ND-GAIN gives Equatorial Guinea a 2023 Country Index score of 42.4, with vulnerability 0.410 and readiness 0.257; it ranks the country as the 101st most vulnerable and 177th most ready country, indicating that adaptation readiness is a major bottleneck even where some physical vulnerabilities are moderate. Weaknesses include governance readiness, social readiness, infrastructure quality, health staff, agriculture capacity and transport infrastructure. (gain-new.crc.nd.edu)
Health vulnerability is linked to heat, rainfall and vector-borne disease. Equatorial Guinea is malaria-endemic, and WHO’s 2024 malaria country profile presents country-validated data on malaria cases, deaths and interventions. Climate-sensitive health risks can increase when heavy rainfall, standing water, heat and disrupted WASH conditions create favorable conditions for vector breeding and water-related disease transmission. (World Health Organization)
4. Sectoral vulnerability
Agriculture and food security: Rainfall variability, floods, dry spells, heat stress, soil erosion and crop disease risks threaten smallholder production. Food-import dependence increases sensitivity to external price shocks, port disruption and global supply-chain volatility.
Water, sanitation and public health: Heavy rainfall and floods can contaminate shallow water sources, damage sanitation infrastructure, increase diarrheal disease risks and create mosquito-breeding habitats. Heat stress can burden health facilities and worsen occupational health risks.
Transport and infrastructure: Roads, bridges, ports, drainage networks, electricity distribution lines, schools and health facilities are vulnerable to floods, landslides and coastal flooding. Infrastructure located in low-lying coastal areas, floodplains or unstable slopes faces high lifecycle risk.
Coastal zones and blue economy: Sea-level rise, coastal flooding, erosion and storm-driven wave action threaten settlements, ports, beaches, mangroves, fisheries infrastructure and tourism assets. Coastal flooding can also interact with urban drainage and river flooding, creating compound-flood conditions.
Forests, biodiversity and ecosystem services: Forest loss and slope disturbance can increase runoff, erosion and landslide risk. Mangroves and coastal wetlands are important natural buffers but are vulnerable to land conversion, coastal erosion and sea-level rise.
Disaster governance and early warning: The country requires stronger risk-informed land-use planning, multi-hazard monitoring, flood and landslide early warning, volcanic surveillance, impact-based forecasting, community-level alert dissemination and emergency preparedness protocols.
5. Priority risk-reduction and adaptation actions
Develop national and city-level multi-hazard risk maps for river floods, urban floods, coastal flooding, landslides, volcanic hazards, erosion, heat stress and critical infrastructure exposure.
Strengthen hydrometeorological monitoring and impact-based early warning, including automatic rain gauges, river-level monitoring, urban flood sensors, satellite rainfall nowcasting, community alerts and clear warning thresholds for Malabo, Bata, Luba and flood-prone inland settlements.
Establish a Bioko volcanic and landslide risk-monitoring programme, integrating volcano observatory functions, slope-stability mapping, rainfall-trigger thresholds, evacuation planning, ashfall/gas risk communication and community preparedness.
Upgrade urban drainage and flood-resilient infrastructure, especially in Malabo and Bata, through drainage clearing, stormwater master planning, flood-safe road design, culverts, retention areas, solid-waste control and enforcement of flood-risk zoning.
Protect coastal ecosystems and infrastructure through mangrove conservation, coastal setback rules, erosion monitoring, nature-based buffers, resilient port design and coastal-flood contingency planning.
Scale climate-smart agriculture and food-security resilience, including crop diversification, resilient seed systems, agroforestry, soil-water conservation, flood-tolerant crops, pest and disease surveillance, local value-chain development and reduced dependence on food imports.
Integrate climate and health surveillance, linking malaria, diarrheal disease, heat stress and flood impacts with weather forecasts, WASH response and health-facility preparedness.
Improve disaster-risk governance and finance, including national risk-data systems, local government preparedness plans, contingency financing, insurance/risk-transfer options for public assets, and stronger coordination among meteorology, environment, civil protection, health, agriculture, water, infrastructure and local authorities.
Equatorial Guinea has identified adaptation and resilience priorities in its NDC across agriculture, biodiversity and ecosystems, forestry, coastal zones, water, health and infrastructure, and it is also preparing its first National Adaptation Plan. These priorities align well with the country’s actual risk profile, but implementation should be grounded in localized geospatial CRVA, hydromet modernization, urban flood resilience, coastal protection, Bioko volcanic-landslide surveillance, and community-centered early warning. (climatepromise.undp.org)
The governmental authority responsible for the main disaster risk management law in Equatorial Guinea is Law No 4/2010 – Law on Prevention and Civil Protection of Equatorial Guinea (the “DRM Law”). The DRM Law is the only legal instrument currently in place and establishes a general framework for disaster management in Equatorial Guinea. The DRM Law states that the Government is the superior body for the direction and coordination of civil protection and may delegate/administer the functions related to Civil Protection.
Equatorial Guinea: Floods – Aug 2025
For several days, the island region of Equatorial Guinea has been hit by persistent rains, affecting several districts of the capital Malabo. However, the most worrying situation occurred in the city of Luba, capital of the province of Bioko Sur. On Saturday, August 2, 2025, heavy rainfall fell on the city for more than nine consecutive hours, causing signicant flooding. At the same time, some neighbourhoods in Malabo, including Pérez, Timbabe and Vicatana, were also affected, although less severely. Faced with this humanitarian emergency, the Equatorial Guinean Head of State has ordered the release of immediate aid for the victims, channelled by the Ministry of Public Works. The emergency aid shipment includes basic necessities such as drinking water, milk, mattresses and first aid kits, among others. A temporary accommodation site has also been set up to accommodate displaced persons. Additional measures are currently being studied in order to provide a response adapted to the seriousness of the situation. The Mayor of Luba, Mr. Bienvenido, appealed for calm and solidarity, inviting all residents as well as people of goodwill to mobilize to help the affected populations. (IFRC, 25 Aug 2025)
Under construction