The Latest Science on Extreme Heat: How Hot Is Too Hot?

极端高温的最新科学:多热才算过热?

Big Take

2025-08-30

13 分钟
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Nearly half a million people die every year as a result of extreme heat. That’s more than the total from hurricanes, earthquakes and floods combined. And as the planet warms the risk of deadly heat is only increasing. On today’s Big Take podcast, Bloomberg’s Zahra Hirji brings Sarah Holder a dispatch from a lab at the forefront of understanding how heat affects the human body. They break down the latest science on deadly heat, why everyone is at more risk than they realize — and what actually works to mitigate those risks. Read more: Scientist Shuts Himself in 104F Chamber in Quest to Study Heat Stress See omnystudio.com/listener for privacy information.
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  • Zahra Hirji covers climate at Bloomberg,

  • and she recently had the opportunity to take a trip to one of the hottest places in the world.

  • I took an elevator and upstairs in a university building, the elevator comes out in a corner.

  • And if you turn left in Canada, there's this long, tall hallway.

  • And all along that hallway is one of the world's largest research facilities dedicated to studying the effects of heat on the human body.

  • We kind of just spent the day walking through,

  • opening door number one, door number two, door number three.

  • Behind each one, there were people doing all kinds of tests.

  • People like Janet Spencer.

  • She's 75 years old.

  • She describes herself as a veteran of the lab.