Scientists Warn El Niño Threatens Southern Africa — Crops Already at Risk

Scientists tracking Pacific Ocean temperatures have issued a stark warning: a major El Niño event is building, and Southern Africa faces the first and most severe consequences. The climate phenomenon, which disrupts rainfall patterns across the continent, could devastate harvests already strained by erratic weather. Authorities in several countries are scrambling to prepare, but experts say the window for action is narrowing fast.

The Science Behind the Warning

El Niño occurs when sea surface temperatures in the central and eastern Pacific rise above normal levels, reshaping atmospheric circulation worldwide. For Africa, the effects typically mean drier conditions across Southern Africa and increased rainfall in East Africa. Researchers monitoring ocean data confirmed that surface temperatures have reached thresholds associated with significant El Niño episodes. The last major event, in 2015–2016, caused crop failures across the region and pushed millions into food insecurity.

Scientists tracking conditions from monitoring stations across the Pacific say current patterns mirror the early stages of the 1997–1998 event, which remains one of the strongest on record. That event caused an estimated $45 billion in global damage and triggered widespread agricultural losses across Africa. The speed at which conditions are developing has surprised some researchers, who expected a weaker episode based on earlier forecasts.

Why Southern Africa Bears the Brunt

Southern Africa's geography makes it particularly vulnerable to El Niño's effects. The region depends heavily on rain-fed agriculture, with millions of smallholder farmers cultivating crops during the October-to-March rainy season. When El Niño suppresses rainfall, the consequences ripple through entire food systems.

In Zimbabwe, Zambia, and Malawi — countries still recovering from recent drought cycles — officials have already begun advising farmers to plant drought-resistant varieties. Mozambique, which faces annual cyclone threats alongside drought risk, is preparing emergency grain reserves. South Africa's grain-producing regions, which supply neighbours across the region, face uncertain planting conditions if rains fail to arrive on schedule.

Crop vulnerability in key regions

Maize, the staple crop for most of the region, is especially sensitive to moisture stress during the critical tasseling period between December and February. Studies from previous El Niño events show maize yields can decline by 20–50 percent when rainfall falls below normal levels during those months. Wheat and sorghum face similar risks, though these crops occupy smaller planting areas in most Southern African nations.

Pastoral communities face compounded challenges. When grazing lands dry up, livestock deaths increase, destroying wealth that families accumulated over generations. In Namibia and Botswana, herder communities have already reported early signs of pasture stress in some areas.

Regional Response Gaps

The African Union's Disaster Risk Management Framework calls for early preparation whenever El Niño conditions are confirmed. However, several Southern African countries lack the resources to mount comprehensive preparedness campaigns. Humanitarian agencies operating in the region warn that funding gaps could leave millions without assistance when the impact peaks.

The World Food Programme has begun pre-positioning supplies in high-risk areas, but officials say they need significantly more resources to meet potential needs. Climate financing mechanisms designed to help African nations adapt to changing weather patterns remain largely inaccessible to the countries most exposed to El Niño's effects, according to development organisations.

National meteorological services across the region are working to improve seasonal forecasting, but communication gaps between scientists and farming communities remain a persistent problem. Many smallholder farmers still rely on traditional planting calendars that do not account for shifting climate patterns.

Connection to Continental Development Goals

El Niño's threat arrives at a difficult moment for African development priorities. The African Union's Agenda 2063 framework targets include achieving food security across the continent, but extreme weather events repeatedly set back progress. Countries that suffer agricultural losses often face years of economic contraction, which compounds existing development challenges.

The event also underscores the disproportionate burden African nations bear from global climate patterns they did little to create. Emissions from industrialised nations contribute to the ocean warming that drives El Niño, yet African communities face the most severe consequences. This disparity has become a focal point in international climate negotiations, where African representatives argue for increased financial support for adaptation measures.

What Happens Next

Meteorologists will have clearer predictions within weeks as Pacific temperatures continue to be measured. If current trends persist, the event could rank among the strongest since records began. Governments across the region face pressure to act before the agricultural season becomes irreversible.

International donors have signalled willingness to support response efforts, but commitments have been slow to materialise. The coming months will test whether early warnings translate into meaningful protection for the millions of people in the firing line.