What is a heat dome? | UNDRR @UNDRR
What is a heat dome? | UNDRR  @UNDRR
Uploaded February 2026 | Updated September 2026, 1 day ago
What exactly is a heat dome?
It’s when a high-pressure air system parks over a region, acting like a lid and locking in heat. When the jet stream stalls, extreme events like heatwaves, wildfires, or torrential rain can stay in place for days—or weeks.

💥 Climate change is making these stuck patterns more likely.
Now is the time to:
✅ Improve early warning systems
✅ Adapt cities for extreme heat
✅ Push for urgent climate action

The next heat dome is coming. Will we be ready?
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What is a heat dome? | UNDRR

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