Climate change will redraw Africa's malaria map: 123 million extra cases by 2050, and extreme weather is the real driver

Climate change is set to fundamentally alter malaria transmission across Africa by 2050, but the most dangerous shift isn't what many expect. While rising temperatures will expand mosquito habitat into cooler highlands, the far bigger threat comes from extreme weather events like floods and cyclones that destroy health infrastructure and interrupt life-saving control programs. A landmark 2026 study published in Nature projects that under a moderate emissions scenario (SSP2-4.5), climate change could cause 123 million additional malaria cases (range: 49.5 million–203 million) and 532,000 additional deaths (range: 195,000–912,000) in Africa between 2024 and 2050, even if current control levels are maintained . Over 90% of those additional deaths are expected to result not from ecological changes but from the disruptive impacts of extreme weather . By 2050, 1.3 billion people in Africa will live in areas where, due to climate change, malaria will be harder to eradicate than it is today .

How transmission patterns are changing

Geographic shifts, not simple expansion

Higher temperatures are making cooler highland areas in eastern and southern Africa more suitable for Anopheles mosquitoes. By 2050, transmission risk is projected to expand into the Rift Valley, the Ethiopian highlands, and coastal southern Africa . In some areas, cases could rise by as much as 20% by the end of the century . However, this is not a uniform expansion: some hotter, drier parts of West and Central Africa may see reduced suitability for malaria transmission as conditions become too arid for mosquito survival . The overall area suitable for transmission increases modestly, but the most suitable zones shift — from coastal West Africa toward the Albertine Rift between the Democratic Republic of Congo and Uganda .

Extreme weather: the overlooked driver

Contrary to the prevailing focus on gradual ecological change, researchers found that over 90% of projected additional deaths would come from the damage and disruption caused by extreme weather events: floods, cyclones, and heatwaves that destroy health infrastructure, interrupt bed-net distribution, displace populations, and create breeding grounds for mosquitoes . Flood area-days in Sub-Saharan Africa are expected to increase by 13–18% by 2050 . The Malaria Atlas Project estimates that the disruptive impacts of floods and cyclones may account for 79% of climate-driven increases in malaria cases and 93% of additional deaths over the next 25 years .

The key takeaway: The biggest threat is not mosquitoes moving into new areas, but extreme weather wiping out progress in the areas where malaria already exists.

Growing population exposure

Population exposure is rising significantly. By 2080 under a high-emissions scenario, an additional 75.9 million people in eastern and southern Africa could face year-round (endemic) transmission risk . Another analysis suggests up to 197 million previously unaffected people in eastern and southern Africa could be exposed to some level of risk . In Western Africa, a net gain of 51.3 million additional people is predicted to be put at some level of risk by midcentury, despite a predominance of reduction in season length .

What researchers recommend for preparedness and mitigation

Climate-resilient (climate-smart) malaria control

Researchers call for a fundamental shift toward "climate-smart" malaria programs that dynamically target interventions based on observed climate lags and thresholds. This means pre-positioning supplies ahead of flood seasons, reinforcing health infrastructure to withstand extreme weather, and adapting strategies in real time as climate conditions change . The approach moves from static planning to anticipatory, locally tailored responses .

Sustained and scaled-up vector control

Maintaining core interventions like insecticide-treated nets (LLINs) and indoor residual spraying (IRS) remains critical. Modeling shows that combining IRS and LLINs can reduce malaria burden by up to 76%, even under climate change scenarios . Without sustained vector control, annual malaria cases could rise 25% to 30% by the 2050s .

Early warning systems using climate data

Integrating seasonal climate forecasts and real-time weather monitoring into malaria surveillance systems can trigger earlier outbreak responses. Researchers emphasize that short-term, locally tailored forecasts should be embedded into routine planning to support anticipatory and equitable malaria control . This allows health systems to act before extreme weather events hit, rather than reacting after damage is done.

Strengthened health systems and community engagement

Governments must invest in robust health infrastructure that can withstand extreme events: floods, cyclones, and heatwaves cannot be allowed to destroy clinics, cold chains for medicines, or bed-net stores. Community engagement and education are highlighted as essential components, recognizing the vital role of local communities in effective malaria control . Cross-sectoral training in surveillance, modeling, and climate forecasting has been proposed as an urgent priority .

Aggressive emissions reduction matters

If the world can limit warming to 2°C, that alone could avert roughly 5 excess malaria cases per 1,000 children in southern Africa compared to higher-emission pathways, with even greater reductions in the East African highlands . While adaptation is crucial, mitigation is equally vital — every fraction of a degree of warming avoided reduces the burden on health systems and communities .