Extreme heat kills one person per minute worldwide, Lancet report finds

By Ariel Wittenberg | 10/30/2025 06:12 AM EDT

Researchers found that 13 out of 20 climate change impacts had accelerated over the years.

The cremated bodies of people with no known family are buried in White Tanks Cemetery after dying in a heat wave in Maricopa County, Arizona.

The cremated bodies of people with no known family are buried in White Tanks Cemetery after dying in a heat wave in Maricopa County, Arizona. Each grave is marked with a red brick. Ross D. Franklin/AP

Global heat-related deaths have surged since the 1990s, with high temperatures killing more than half-a-million people annually, according to an audit on the worldwide health impacts of climate change.

“That means approximately one heat-related death every minute throughout the year, a really startling number that is going up,” said Ollie Jay, a professor at the University of Sydney, Australia, who co-authored the report.

Rising heat is one way climate change is killing people across the globe. Other dangers include air pollution and vector-borne diseases, both of which are also sickening people. The report, known as the “Lancet Countdown on Health and Climate Change,” was published as many governments are off-track to meet their goals toward reducing greenhouse gases.

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The annual report by The Lancet is produced by 128 experts from 70 academic institutions and United Nations agencies. It examines 20 so-called indicators of the health impacts and risks of climate change. This year, 13 of them have gotten more severe. In addition to worsening heat and disease, the report points to other impacts:

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