. Increases at 1.5°C of global warming are projected in marine heatwaves  and the occurrence of fire weather . Heat-related mortality is assessed to increase from moderate to high levels of risk under about 1.5℃ warming under SSP3, a socioeconomic scenario with large challenges to adaptation  especially in urban centres . An additional 350 million people living in urban areas are estimated to be exposed to water scarcity from severe droughts at 1.5°C warming . In summary, there is high confidence that the best estimate for the transition from moderate to high risk is 1.2°C of global warming, with 1℃ as lower estimate and 1.5℃ as upper estimate. The latter would be set to 1.3ºC for an assessment at medium confidence.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report