Nigeria could face increased risks from extreme heat and changing weather patterns as a strong El Niño event intensifies, with scientists warning that its effects could continue into early 2027.

The World Meteorological Organization (WMO) said on October 8 that the climate phenomenon was expected to strengthen further, potentially bringing above-average temperatures to many parts of the world and changing rainfall patterns in different regions. Its earlier forecast indicated that the event could persist into February 2027.

The Nigerian Meteorological Agency (NiMet) also confirmed the onset of a strong El Niño in its August 2026 update, warning that the event could influence global climate patterns during the August to October period.

The development has raised concerns about the potential effects on Nigerians, particularly farmers, outdoor workers, households facing rising food costs and communities vulnerable to water shortages or flooding.

A report by the Climate Impact Lab, published in September and reported by TheCable on October 22, projected that Nigeria could record an additional 31,400 heat-related deaths between September 2026 and February 2027 compared with a normal year. The figure is a projection, not a confirmed death toll, and actual outcomes will depend on weather conditions, exposure and measures taken to protect vulnerable people.

El Niño occurs when sea surface temperatures in the central and eastern tropical Pacific Ocean become unusually warm for an extended period. This warming influences atmospheric circulation, changing the movement of heat and moisture and affecting weather patterns in distant parts of the world.

The phenomenon is part of the El Niño–Southern Oscillation, or ENSO, a natural climate cycle with three broad phases: El Niño, La Niña and ENSO-neutral conditions.

Although El Niño can influence temperatures and rainfall across the globe, its effects are not the same everywhere. A strong event does not automatically mean every part of Nigeria will experience drought, extreme heat or flooding. Local conditions and other climate systems also influence the outcome.

For Nigeria, five potential areas of concern stand out.

One is agriculture and food prices. Changes in rainfall, including prolonged dry spells or poorly timed rain, can affect crop development, particularly for farmers who depend on rainfall rather than irrigation. If harvests decline in affected areas, supplies of some food items could tighten and put additional pressure on prices. However, the extent of any impact will depend on actual rainfall patterns, harvest performance, storage and distribution.

A second concern is extreme heat and public health. Higher temperatures can make outdoor activities more dangerous and increase the risk of dehydration, heat exhaustion and heatstroke. Farmers, construction workers, traders, transport workers and others who spend long hours outside may be especially exposed. Higher temperatures can also increase demand for fans and air conditioners, potentially adding to household electricity costs.

Third, prolonged dry conditions could worsen water shortages and pressure on livestock. When rainfall is insufficient, rivers, reservoirs and other water sources may receive less replenishment. Pasture may also become scarce, making it harder for herders to find adequate water and grazing land. Such conditions can affect livestock health, productivity and the livelihoods of pastoral communities.

Fourth, Nigerians should not assume that a period of heat or limited rainfall rules out flooding. El Niño changes the likelihood of certain weather patterns rather than eliminating heavy rain. Intense rainfall can still trigger flash floods, especially in low-lying communities and areas with inadequate drainage. Flooding can damage homes and farms, destroy crops and force residents to leave affected areas.

Fifth, changing weather conditions can affect public health risks linked to water and insects. Floodwater may contaminate drinking-water sources and increase the risk of diseases such as cholera and diarrhoeal infections. Temperature and rainfall changes can also influence mosquito breeding and malaria transmission, although the effects vary by location and season.

NiMet’s seasonal climate predictions and subsequent updates remain important for determining which Nigerian states face particular rainfall or temperature risks. Broad El Niño forecasts should not be treated as a substitute for local weather warnings.

Nigerians can take practical steps to reduce their exposure to these potential risks.

People should drink clean water regularly, wear lightweight clothing and limit strenuous outdoor activities during the hottest parts of the day. Anyone who develops signs of severe heat illness, including confusion, collapse or altered consciousness, needs urgent medical attention.

Households should also check on young children, older people and anyone particularly vulnerable to extreme heat. Farmers can follow NiMet’s agricultural advisories when making decisions about planting, irrigation and other farm activities.

Where heavy rainfall is forecast, residents should clear drainage channels, avoid walking or driving through floodwater and keep medicines, important documents and electrical equipment away from areas likely to flood. Families who face possible water shortages can store clean drinking water safely in covered containers.

Households concerned about food costs can plan meals, reduce food waste and keep a reasonable supply of essential non-perishable items within their budgets rather than panic-buying.

The central message is that El Niño raises the possibility of significant weather and health risks, but it does not determine exactly what every Nigerian community will experience.

As the event develops, residents should rely on updates from NiMet, relevant emergency-management agencies and public-health authorities, paying particular attention to forecasts for their own locations.