The effect of climate change on productivity is projected to reduce GDP at a range of geographical scales  . For example, measuring economic costs using occupational health and safety recommendations, it was estimated that RCP8.5 would result in a 2.4% reduction in global GDP compared to a 0.5% reduction under RCP2.6 . For the USA, it was estimated that the total hours of labour supplied declined ~0.11%  per degree Celsius increase in global mean surface temperature for low-risk workers and 0.53%  per degree Celsius increase for high- risk workers exposed to outdoor temperatures . Further, a systematic review of the literature indicates that extreme heat exacts a substantial economic burden on health systems, which bears implications for future heat-attributable healthcare costs .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report