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Nigeria could face increased heat and changing rainfall patterns as a strengthening El Niño event raises concerns about its potential effects on agriculture, water supply, electricity generation and public health.
The World Meteorological Organisation (WMO) said in September 2026 that El Niño was expected to strengthen into a very strong event and persist into early 2027.
The Nigerian Meteorological Agency (NiMet) has also warned that the phenomenon could influence rainfall patterns across the country, including the length of the rainy season and when it ends.
Although El Niño develops in the Pacific Ocean, thousands of kilometres from Nigeria, its effects on global atmospheric circulation can influence weather conditions in West Africa.
What is El Niño?
El Niño is a natural climate phenomenon that occurs when surface waters in the central and eastern tropical Pacific Ocean become warmer than average.
The warming affects atmospheric circulation and can alter weather patterns across different parts of the world. Depending on the region, it may contribute to higher temperatures, reduced rainfall, excessive rainfall or changes in seasonal weather conditions.
El Niño forms part of the El Niño-Southern Oscillation (ENSO), a climate pattern that includes La Niña, its cooler phase, and neutral conditions.
According to the WMO, El Niño typically occurs every two to seven years and lasts between nine and 12 months. Its effects are not uniform, however, and the phenomenon does not automatically mean every affected country will experience drought or extreme heat.
How El Niño could affect Nigeria
NiMet’s August 2026 seasonal climate update identified a strong El Niño event and outlined possible implications for rainfall, agriculture, water resources and energy production.
For August to October 2026, the agency forecast normal to above-normal rainfall across much of northern Nigeria, while parts of the South-West and Cross River State were expected to experience normal to below-normal rainfall.
The projections suggest that the potential effects could vary significantly between regions, making localised forecasts important for preparedness.
Higher temperatures and health risks
One of the major concerns is the possibility of increased heat and its consequences for public health.
In October 2026, the Climate Impact Lab projected that Nigeria could record an additional 31,400 heat-related deaths between September 2026 and February 2027 compared with an average year.
The figure is a model-based estimate of potential excess deaths, not a confirmed death toll or a guarantee that the projected deaths will occur.
Extreme heat can cause dehydration, heat exhaustion and potentially fatal heatstroke. Children, older people and outdoor workers may be particularly vulnerable.
Residents are advised to drink water regularly, seek shade and limit strenuous outdoor activities during the hottest hours where possible. Families should also check on vulnerable relatives and neighbours.
Health authorities, meanwhile, should strengthen public awareness campaigns, issue timely heat warnings and prepare medical facilities to respond to heat-related emergencies.
Agriculture and food production
Changes in rainfall patterns could disrupt farming activities, particularly where crops depend heavily on seasonal rainfall.
Prolonged dry spells or an early end to the rainy season could affect planting schedules, reduce crop yields and threaten farmers’ livelihoods. Excessive rainfall, on the other hand, could cause flooding, damage farmland and destroy crops.
NiMet has identified potential agricultural risks in areas expecting below-normal rainfall, including parts of Borno and Yobe states.
Farmers are encouraged to follow updated weather forecasts, consider early-maturing or drought-tolerant crop varieties where suitable and seek guidance from agricultural extension officers.
In areas expecting heavier rainfall, clearing drainage channels and preparing farmland to manage excess water could help reduce losses.
Government agencies also need to ensure that farmers, especially those in rural communities, receive timely and understandable weather information.
Water supply and electricity generation
A prolonged rainfall deficit could reduce river flows, reservoir levels and groundwater recharge, putting pressure on domestic water supplies and irrigation.
Hydroelectric power generation could also be affected if water inflows into dams decline. NiMet has identified reduced water availability and lower reservoir inflows as potential risks.
However, these projections do not confirm that Nigeria will experience nationwide water shortages or electricity disruptions.
Water authorities should monitor reservoirs and groundwater levels, identify vulnerable communities and develop contingency plans for possible shortages.
Households can also help by repairing leaking taps, storing water safely and avoiding unnecessary waste.
Food prices and household expenses
Weather-related disruptions to agricultural production could affect food availability and place additional pressure on household expenses.
Poor harvests, crop damage and transportation difficulties may contribute to higher food prices in affected areas.
However, El Niño alone does not mean food prices will rise nationwide. Harvest volumes, storage facilities, transportation costs and broader market conditions will also influence prices.
The government can reduce potential losses by supporting farmers in vulnerable areas, monitoring food supplies and strengthening storage and distribution systems.
How Nigeria can prepare
Preparing for the potential effects of El Niño will require coordination among government agencies, state authorities, farmers, health workers, businesses and residents.
NiMet should continue providing updated, location-specific forecasts and ensure that warnings reach rural communities and farmers who may not have reliable internet access.
Health authorities should educate the public about heat-related illnesses and strengthen emergency responses, particularly for vulnerable groups.
Agricultural ministries and extension officers should provide guidance on planting schedules, crop selection, irrigation and drainage based on current forecasts.
Water agencies should monitor dams and reservoirs, reduce water distribution losses and prepare for communities that may face shortages. Authorities must also remain alert to heavy rainfall and flooding rather than focusing exclusively on drought.
Broadcasters and journalists have a role to play in communicating climate information clearly, distinguishing projections from confirmed events and updating the public as new information becomes available.
Does El Niño mean disaster for Nigeria?
El Niño does not automatically mean disaster for Nigeria. Although it can increase the likelihood of certain climate-related impacts, it does not determine precisely what will happen in every state.
The WMO has emphasised that even a very strong El Niño event does not produce equally severe effects everywhere. Local weather patterns and other climate drivers can influence its impact.
Nigeria’s priority should therefore be to identify communities most vulnerable to extreme heat and rainfall changes and prepare for different possible outcomes.
Following NiMet’s updates, improving access to reliable weather information and taking practical precautions could help reduce risks to public health, agriculture, water resources and electricity generation.
Ultimately, the challenge is not simply how strong El Niño becomes, but how effectively Nigeria prepares for its potential consequences.
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