Climate Change Intensifies Catastrophic Flooding in Southern Africa

Severe flooding across southern Africa, particularly affecting Mozambique, South Africa, Zimbabwe, and Eswatini, has resulted in over 200 fatalities and displaced hundreds of thousands since late December 2025. The World Weather Attribution (WWA) study attributes the unprecedented rainfall—equivalent to a year's worth in just ten days—to human-caused climate change, exacerbated by the cyclical La Niña weather phenomenon. The floods have caused extensive damage to infrastructure, housing, and agriculture, with economic losses estimated in the millions of dollars.

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Researchers have determined that the intensity of extreme rainfall events in southern Africa has increased by approximately 40% since pre-industrial times, primarily due to climate change. Izidine Pinto, a senior climate researcher at the Royal Netherlands Meteorological Institute, noted that the combination of intense rainfall and high vulnerability among communities led to the worst flooding in Mozambique in 25 years. The current La Niña conditions, which typically bring wetter weather to the region, further intensified the rainfall, making such extreme events five times more likely.

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The flooding has severely impacted Mozambique, where over 180,000 hectares of farmland have been inundated, leading to food shortages and economic distress. In the Gaza province, cities like Xai-Xai and Chokwe were largely submerged, and many homes were destroyed. South Africa's Limpopo and Mpumalanga provinces also faced significant damage, with infrastructure like roads and bridges swept away, isolating communities and prompting national disaster declarations.

Manmade climate change worsened flooding disaster in southern Africa, study says

The floods have triggered a humanitarian crisis, with reports of overcrowded shelters and rising health risks, including cholera outbreaks. Renate Meyer from the Red Cross highlighted the deep social vulnerabilities in the region, where many people live in inadequate housing that cannot withstand extreme weather. The floods have exacerbated existing challenges, including malnutrition among children and limited access to healthcare services.

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Experts have criticized the lack of localized climate models in Africa, which hampers the ability to accurately predict and respond to such extreme weather events. Friederike Otto, a climate science professor, emphasized that the affected populations, who contribute minimally to global emissions, are disproportionately suffering the consequences of climate change. Calls for increased international aid and better infrastructure planning have intensified, as the region grapples with the ongoing impacts of climate change.

Climate change worsened rains, floods which killed dozens in southern Africa: Study

The WWA study concluded that the flooding serves as a "textbook case of climate injustice," as the most affected communities have not contributed to the climate crisis yet bear the brunt of its impacts. Local authorities and humanitarian organizations are urging for immediate support to address the escalating needs of displaced populations and to strengthen resilience against future flooding events.

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As southern Africa continues to face the aftermath of these floods, experts warn of the potential for further extreme weather events due to ongoing climate change and La Niña conditions. Immediate action is needed to improve infrastructure, enhance early warning systems, and provide humanitarian assistance to the affected populations.

Climate change, La Niña fuelled southern Africa's catastrophic floods