1 School of Geographical Sciences, University of Bristol, Bristol, UK.
2 Chemical and Environmental Effects Department, Public Health England, Oxford, UK.
3 School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK.
4 London School of Hygiene and Tropical Medicine, London, UK.
5 Center for International Climate and Environmental Research, Oslo, Norway.
6 Environmental Change Institute, University of Oxford, Oxford, UK.
7 Department of Global Health, University of Washington, Seattle, WA, USA.
8 Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland.
9 Canadian Centre for Climate Modelling and Analysis, Environment and Climate Change Canada, University of Victoria, Victoria, British Columbia, Canada.
10 Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan.
11 The Norwegian Institute of Bioeconomy Research, Ås, Norway.
12 Institute of Occupational Medicine, Edinburgh, UK.
13 European Centre for Environment and Human Health, University of Exeter Medical School, Truro, UK.
In key European cities, stabilizing climate warming at 1.5 °C would decrease extreme heat-related mortality by 15-22% per summer compared with stabilization at 2 °C.