A new investigation shows heat is even deadlier than we thought

A new investigation shows heat is even deadlier than we thought

September 4, 2026 · 15 min

About this episode

This episode discusses a new NPR investigation revealing that heat is causing more deaths in the U.S. than previously recorded.

Hot weather isn’t just an inconvenience. It’s killing thousands more Americans than show up in official records. That’s the finding from a new NPR investigation, in partnership with Boston University. And the way they came up with that new, better estimate of the true toll of heat is, of course, with science . This episode, we’ll bring you all the details – and chat about why getting good estimates could save lives. Interested in more science-based investigations? Email us your question at shortwave@npr.org . Support public media with NPR+ and enjoy perks for over 25 podcasts like this one. This show’s perks include sponsor-free listening. Learn more at plus.npr.org . See pcm.adswizz.com for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. NPR Privacy Policy

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Organizations: NPR, Boston University

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