Comparisons of heatwave exposure for 1.5℃ and 2.0℃ warming for different SSPs indicate strong geographical contrasts in potential heatwave risk . One global level assessment for a 1.5°C warming projects that low human development index countries will experience exposure levels equal to or greater than the exposure levels for very high human development index countries under a 2°℃ warming . The same assessment also finds that holding global warming below 1.5℃ in tandem with achieving sustainable socioeconomic development  yields reduced levels of heatwave exposure, especially for low human development index countries, particularly across sub-Saharan Africa. Similar findings were found in other global level assessments. Global exposure to extreme heat increases almost 30 times under a SSP3- 8.5 combination, with the average exposure for Africa 118 times greater than historical levels, in stark contrast to the four-fold increase projected for Europe. Compared to a SSP3-8.5 scenario, exposure was reduced by 65% and 85% under the SSP2-4.5 and SSP1-2.6 scenarios, respectively .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report