Heat stress is projected to reduce working hours and work capacity under climate change, with among the largest declines in sub-Saharan Africa and for workers in vulnerable occupation groups, such as those working outdoors . Global warming of 3ºC is projected to reduce labour capacity in agriculture by 30-50% in sub-Saharan Africa  . These effects lead to substantial aggregate losses, for example, in west Africa, labour productivity impacts under a 3ºC temperature increase are estimated to cost up to 8% of GDP . Manufacturing productivity across Africa is projected to decline under RCP8.5 by 0-15% by 2080-2099, with the largest effects in the DRC, Ethiopia, Somalia, Mozambique and Malawi .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report