Climate Change

More People Exposed to Extreme Heat Worldwide

Data from the IEA and OECD Climate Hazard Exposure Tracker shows how rising temperatures are affecting more and more people.

On average, between 1979 and 1983, 57% of the world’s population experienced extreme heat, defined as days when maximum temperatures exceed 35°C. In comparison, between 2018 and 2022, 71% of the world’s population – about 5.7 billion people – experienced extreme heat.

The IEA and OECD data for 2022 provides a breakdown of the duration of this exposure. About 25.6% of the world’s population experienced extreme heat for more than 8 weeks per year, 5% for 6 to 8 weeks, 6.8% for 4 to 6 weeks, 9.5% for 2 to 4 weeks, and 24.9% for less than 2 weeks.

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