Fig. 1: Example cities.

a–c Age grouped exposure-response relationships, d–f temperature averaged over the warmest 2% days between 2015 and 2017, and g–i histograms of average temperature-related mortality estimates during the warmest 2% days shown separately for urban and rural areas for a, d, g Milan, b, e, h London, and c, f, i Stockholm. Vertical dashed lines in black/gray in a–c, g–i are the urban average over the warmest/coldest 2% days; vertical dotted lines, are the rural average. Hatching indicates rural areas in d–f, where areas excluded from analysis (water bodies and areas with elevation differential >100 m from the population-weighted average) are shown in white.