range due to changing environmental suitability, combined with rapid urbanisation and population growth, suggest that by 2050 populations exposed to these vectors in Africa may double, and by 2080 nearly triple at >2℃ global warming . Southern limits of dengue transmission in Namibia and Botswana, and the western Sahel, may show the greatest expansions in environmental suitability under 1.8°C-2.6°C global warming . In the warmest scenarios , however, some parts of central Africa may become too hot for mosquitoes to transmit dengue, and thus at-risk populations may peak at intermediate warming levels . Climatic conditions favourable for mosquitoes, combined with the increase of animal trade, may result in the expansion of the geographic range of zoonotic diseases like RVF , a threat for human and animal health with strong socioeconomic impacts .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report