TS.B.5.3 Increasing temperatures and heatwaves have increased mortality and morbidity , with impacts that vary by age, gender, urbanisation and socioeconomic factors . A significant proportion of warm-season heat-related mortality in temperate regions is attributed to observed anthropogenic climate change , with fewer data available for tropical regions in Africa . For some heatwave events over the last two decades, associated health impacts have been partially attributed to observed climate change . Highly vulnerable groups experiencing health impacts from heat stress include anyone working outdoors and, especially, those doing outdoor manual labour . Potential hours of work lost due to heat have increased significantly over the past two decades . Some regions are already experiencing heat stress conditions at or approaching the upper limits of labour productivity . 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report