Populations worldwide face unprecedented dangers from rapid climate change. The past 11 years have been the hottest on record.1 The 2025 Lancet Countdown report documented record-breaking health impacts and risks across 65% of the climate change health threats it monitors. Many records continue to be broken annually: 2026 had the hottest July on record; east Asia and much of Europe had unprecedented heatwaves with record heat-related deaths; and Germany alone registered 14 000 deaths by early August.
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Romanello et al. (2026) studied this question.
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