AR5 identified a transition from undetectable to moderate risk below 'recent' temperatures . SR15 Section 3.5.2.2  concluded that differences of 0.5℃ in global warming led to detectable changes in extreme weather and climate events on the global scale and for large regions. IPCC WGI AR6 Chapter 11 confirms this assessment and concludes that 'new evidence strengthens the conclusion from SR15 that even relatively small incremental increases in global warming  cause statistically significant changes in extremes on the global scale and for large regions'. Substantial literature is available for comparisons at +1.5℃ versus +2℃ of global warming, but the conclusions are assessed to also apply at lower global warming levels and smaller increments of global warming given the identified linearity of regional responses of several extremes in relation to global warming  and the identification of emergence of global signals in climate extremes for global warming levels as small as 0.1°℃ . Further analyses are consistent with this assessment, based on model simulations  and observational evidence . A global warming of +0.5°℃ above pre-industrial conditions corresponds approximately to climate conditions in the 1980s , a time frame at which detectable changes in some extremes were established at the global scale based on observations . Heat-related mortality has also been assessed to have increased considerably because of climate change (Ebi et al., 2021; Vicedo-Cabrera
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report