The African Development Bank (AfDB) has warned that a potentially severe “super” El Niño weather event could cost African economies between $10 billion and $20 billion, weaken economic growth and increase the risk of mass migration.
The warning comes amid growing concerns about the impact of climate change in Africa, particularly on countries already dealing with food insecurity, water shortages, infrastructure challenges and limited fiscal space.
According to AfDB climate chief Anthony Nyong, some of the countries most affected by extreme weather could experience a 1 to 2 per cent decline in GDP. Nigeria is among the countries identified as potentially facing serious humanitarian and economic consequences.
What Is a Super El Niño?
El Niño is a natural climate pattern associated with unusually warm ocean temperatures in the central and eastern Pacific Ocean. Although the phenomenon begins thousands of kilometres away from Africa, it can influence weather patterns across different parts of the world.
For African countries, the effects can include droughts, flooding, storms and irregular rainfall. Such conditions can disrupt agriculture, affect water supplies, damage infrastructure and increase pressure on governments to provide emergency assistance.
The latest AfDB warning has therefore renewed concerns about the relationship between El Niño and African economic growth.
Nigeria Faces Potential Food and Water Pressure
Nigeria could be particularly vulnerable if extreme weather conditions disrupt agricultural production and access to water.
Agriculture remains an important source of income and employment for millions of Nigerians, especially in rural communities. Severe drought, flooding or irregular rainfall could affect crop yields and put additional pressure on vulnerable households.
The consequences could extend beyond farming. Lower agricultural production could contribute to higher food prices, weaker household incomes and increased government spending.
The AfDB has warned that maize prices could potentially double in some affected areas, creating additional pressure on food security.
Climate Disasters Could Deepen Africa's Financial Problems
A major concern is the financial burden that climate disasters could place on African governments.
Countries already struggling with debt may be forced to redirect resources originally intended for healthcare, education and infrastructure towards emergency relief, reconstruction and humanitarian assistance.
This could create a climate finance trap in which governments repeatedly spend scarce resources responding to disasters instead of investing adequately in long-term resilience.
The AfDB estimates that Africa's annual climate adaptation financing needs could rise significantly, potentially reaching as much as $100 billion because of the expected severity of climate-related threats.
Mass Migration Risk Raises Concern
The potential for mass migration in Africa is another major concern raised by the AfDB.
When droughts, floods and food shortages make it difficult for communities to maintain their livelihoods, affected populations may be forced to relocate in search of food, water, employment and safer living conditions.
Nigeria, Sudan, South Sudan, the Democratic Republic of Congo, Somalia, Mali and Burundi are among countries identified as potentially vulnerable to serious humanitarian consequences.
Large-scale displacement could create additional pressure on cities and neighbouring communities while increasing demand for housing, healthcare, food and other essential services.
Lessons From the Previous El Niño
The warning comes after the 2023–2024 El Niño event, which produced significant consequences across parts of Africa.
That episode contributed to severe drought, poor harvests and rising food prices in affected areas. Climate-related impacts have also affected farming and fishing communities.
The experience demonstrates how extreme weather can quickly move from an environmental problem into a major economic and humanitarian crisis.
Africa's Economic Growth Could Be Affected
The warning comes at a sensitive time for the continent's economic outlook.
A major climate event could create additional economic headwinds by reducing agricultural output, damaging infrastructure and increasing government expenditure.
For Nigeria, the consequences could include increased pressure on food inflation, agricultural productivity, public finances and economic growth if extreme weather conditions become widespread.
AfDB Calls for Early Climate Investment
The African Development Bank is encouraging governments to focus on preparation rather than waiting for disasters to occur.
Investment in climate resilience and adaptation before extreme weather events occur could be significantly cheaper than paying for reconstruction and humanitarian relief afterwards.
The AfDB is also exploring ways to work with international climate-financing institutions to mobilise additional resources for countries that may be affected.
What Nigeria Can Do
For Nigeria, the warning highlights the importance of strengthening climate resilience across agriculture, water management and infrastructure.
Investment in irrigation, flood control, climate-smart agriculture, early-warning systems and resilient infrastructure could help reduce the impact of extreme weather.
Improved access to climate financing could also help Nigeria prepare for potential disasters without putting excessive pressure on public finances.
The potential El Niño impact on Nigeria therefore goes beyond weather. It could affect food prices, rural livelihoods, government spending and migration patterns.
Conclusion
The AfDB's warning about a possible super El Niño is a reminder that climate events can have consequences far beyond the environment.
For Nigeria and other African countries, the potential $10 billion to $20 billion economic cost, coupled with the risk of food shortages, displacement and weaker economic growth, makes climate preparedness increasingly important.
The coming months will show how severe the weather pattern becomes. But the message from the AfDB is clear: investing in resilience before disaster strikes could be far less costly than responding after the damage has been done.
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