Climate change could lead to 500,000 ‘additional’ malaria deaths in Africa by 2050 | News | Eco-Business
A new study published in Nature reveals a concerning link between climate change and the spread of malaria in Africa. Researchers predict that even if current international climate pledges are met, the continent could see an additional 123 million cases of malaria over the next 25 years.
The Climate-Malaria Connection
Worsening Conditions
The study highlights how a warming climate will likely exacerbate extreme weather events, such as flooding, across much of Africa. These disruptions are expected to significantly impede malaria treatment programs and damage housing, creating conditions ripe for increased transmission.
Disruption as a Primary Driver
According to the research, 79 percent of the projected increase in malaria transmission risk and 93 percent of additional deaths will be attributable to these disruptions. The remaining increase is linked to rising temperatures and shifting rainfall patterns, which alter the geographic range suitable for malaria-carrying mosquitoes.
A Focus on Existing Vulnerabilities
Researchers at Curtin University’s school of population health and the Malaria Atlas Project emphasize that existing analyses often overlook the vulnerability of current malaria prevention and treatment systems to climate-related disruptions. Prof Peter Gething and Prof Tasmin Symons note that Africa’s malaria risk is already heavily shaped by climate fragility.
The Scale of the Challenge
Global Impact
Malaria remains a significant global health threat, with the World Health Organization estimating 610,000 deaths in 2024. In that year, Africa accounted for 95 percent of all malaria cases and deaths worldwide, with children under five years old comprising three-quarters of fatalities.
Mosquito Ecology
The disease is spread by mosquitoes that thrive in warm temperatures around 29°C and require stagnant water for breeding. The areas where malaria can be transmitted are intrinsically linked to climate conditions. Rising temperatures and altered rainfall patterns are expanding the areas suitable for mosquito populations.
Regional Variations
While the overall trend points to increased risk, the study indicates that the impact will not be uniform across Africa. Warming temperatures may increase malaria risk in regions currently too cold for mosquito survival, including parts of Angola, the Democratic Republic of Congo, Zambia, and highland areas in several East African nations. Conversely, transmission may decrease in the Sahel as temperatures exceed optimal levels for mosquitoes.
Looking Ahead
Potential Scenarios
The study projects that, even with current climate pledges, an additional 123 million clinical cases of malaria could occur across Africa by 2050, potentially leading to 532,000 additional deaths if mortality rates remain constant. However, the authors acknowledge that other factors, such as food insecurity, conflict, and climate-driven migration, could also influence malaria transmission.
The Importance of Resilience
The authors suggest that eradicating malaria would be a monumental achievement, but requires “climate-resilient control strategies.” This includes investing in robust health infrastructure and supply chains, as well as strengthening early warning systems for extreme weather events.
Frequently Asked Questions
What is the primary driver of increased malaria risk according to the study?
The study finds that 79 per cent of the future increase in malaria transmission will be due to the “disruptive” impacts of more frequent and severe weather extremes, such as flooding and cyclones.
Which regions of Africa are expected to see the greatest increase in malaria risk?
The study suggests that the risk will increase in “main river systems” and the “cyclone-prone coastal regions of south-east Africa,” as well as in regions where temperatures are currently too low for mosquitoes to survive, including parts of southern Africa and highland areas in East Africa.
What is the role of climate change in expanding the range of malaria-carrying mosquitoes?
Rising temperatures and shifting rainfall patterns are changing the areas where mosquitoes can survive and breed, potentially expanding the geographic range of malaria transmission, although this effect is less significant than the disruptive impacts of extreme weather.
Given these projections, how can communities and healthcare systems best prepare for the increasing threat of malaria in a changing climate?