Heat Stress 1 (IMAGE)

ECMWF

Heat Stress 1

Caption

Changes in feels-like temperatures (UTCI), heat stress days and tropical nights over time. Maps show the difference between the 1970s and the last 10 years (2015–2024), based on decadal averages of: the 10 highest daily maximum UTCI values per year (°C), the 10 highest daily minimum UTCI values per year (°C), the annual number of days with at least very strong heat stress (UTCI ≥ 38°C) and the annual number of tropical nights (minimum temperature ≥ 20°C). Line charts show the global average for each indicator, for each year from 1950 to 2024, with trends per decade since the 1970s shown above each chart. Data: ERA5-HEAT. Source: Emerton et al., 2026: Global heat stress intensification and its expanding footprint on the human population, Nature Climate Change, https://doi.org/10.1038/s41558-026-02670-5

Credit

ECMWF

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