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The Weather Channel

What is a heat dome?

The Weather Channel · Just In
The Weather Channel
The Weather Channel
Just In

A heat dome happens when a strong high-pressure system traps hot air near the surface, causing temperatures to soar. It acts like a lid on the atmosphere, intensifying heat and limiting cloud cover or rain, often leading to dangerous and prolonged heat waves.

Breakdown
  • A heat dome is a strong area of high pressure that remains over a region. 6s
  • It traps hot air underneath, intensifying heat over consecutive days. 12s
  • Sinking air compresses and heats up, making temperatures more extreme. 18s
  • Heat domes usually bring little rain, offering minimal relief from the heat. 24s
  • Heat domes can last for days and pose serious health risks. 27s
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