Climate shift cuts malaria in West Africa, raises risk elsewhere
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- Tamma Carleton and colleagues analyzed over 50,000 malaria surveys from sub-Saharan Africa and used climate models to project that high emissions could lead to 45 fewer children per 1000 infected in West Africa by 2100
- Democratic Republic of the Congo could see 16 fewer malaria cases per 1000 children by 2100 under high emissions due to rising temperatures making mosquito survival harder
- Ilan Noy states that while the study is meticulous, climate is only a second-order factor compared to public health investments, which are essential for breaking transmission chains
- Sadie Ryan calls the study 'elegant' and emphasizes the stark evidence of climate-driven shifts in malaria distribution, underscoring the need for mitigation
- Malaria caused an estimated 610,000 deaths globally in 80 countries in 2024, with transmission peaking at 26°C and becoming unviable above 34°C or below 16°C
- Cooler or high-elevation areas like parts of Kenya, Burundi, Angola, Zambia, and northeastern South Africa are projected to see increased malaria prevalence as temperatures rise
Why it matters: West and Central Africa may benefit from declining malaria cases due to extreme heat disrupting mosquito habitats, but vulnerable populations in cooler regions with weaker health infrastructure and less immunity will face rising risks—shifting the burden rather than reducing it overall. Public health capacity, not climate alone, determines elimination success.
