Zero: The Climate Race Big Take: How hot is too hot? The latest science on extreme heat
9 snips
Sep 2, 2025 Extreme heat claims nearly half a million lives each year, surpassing natural disasters like hurricanes. The science behind how heat affects the human body is more critical than ever as temperatures rise. Researchers reveal alarming health risks, especially for vulnerable populations. Cooling strategies are discussed, including public cooling centers, but effectiveness varies by region. Plus, there's a spotlight on heat exposure risks for workers and the tech advancements aimed at protecting them. Discover how we can better manage the effects of soaring temperatures.
AI Snips
Chapters
Transcript
Episode notes
Retiree Sleeps In 36°C Chamber
- Janet Spencer, 75, volunteered for multi-day passive heat trials and described boredom and cognitive slowdown within an hour.
- She sometimes slept in the chamber and resorted to mindless games as heat impaired concentration.
Treadmill And Cycling Tests Show Fatigue
- Bob Stryker and Lutz Suckstorf did active treadmill and cycling tests to simulate work in heat.
- Participants reported mental drain where movement became effortful after sustained exertion.
Heat Kills More Than Other Disasters
- Nearly half a million people die annually from extreme heat, surpassing hurricanes, earthquakes, and floods combined.
- The true toll is likely higher because heat-linked deaths (e.g., heart problems) are undercounted.