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131

"Nonsurvivable": Today's heatwaves have surpassed our bodies' ability to stay cool (www.motherjones.com)

submitted 1 day ago by HellsBelle@sh.itjust.works to c/world@lemmy.world

10 comments fedilink hide all child comments

Extreme heat is already creating “nonsurvivable” conditions for humans in heatwaves that have killed thousands and likely many more, according to new research that warns people are more susceptible to rising temperatures than first thought.

Scientists re-examined six extreme heatwaves between 2003 and 2024 and found that when temperature, humidity, and the body’s ability to stay cool were accounted for, all were potentially deadly for older people.

The absolute limit for humans to survive had been assumed to be a six-hour exposure to a wet bulb temperature of 35C (95F)—a measure that accounts for temperature and humidity but has rarely been observed on the planet at that level.

Heatwaves in Mecca (Saudi Arabia, 2024), Bangkok (Thailand, 2024), Phoenix (United States, 2023), Mount Isa (Australia, 2019), Larkana (Pakistan, 2015) and Seville (Spain, 2003) saw thousands of deaths, despite none approaching that wet bulb limit, the research found.

But when scientists applied a new model of human survivability that takes into account the body’s ability to function and stay cool depending on age, they found all six events had seen nonsurvivable periods for older people who could not find shade.

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[–] daannii@lemmy.world 15 points 22 hours ago

When I was in grade school. I guess sometime in the late 90s, We learned about global warming in school.

I remember thinking it was terrifying that we would all be cooked alive.

That night I had this terrible dream that it was a hot sunny day but we had to stay in the house until dusk. And when I did venture out, our outdoor dog was dead and the yard was full of dead birds. And it was so silent.

I still remember that dream.