Italics: Subset listing cities hit by temperatures over 40°C are only from the USA, China, India, Australia, and Italy. Data from (Adnan et al., 2022; Broadbent et al., 2022; Nandi and Swain, 2023; Marvuglia et al., 2020; Nishant et al., 2022; Sharma et al., 2022; Sethi et al., 2021; Shen et al., 2022; Yang et al., 2019; Yin et al, 2018);

*removed from the C40 list, but often with temperatures above 40°C