Weather Words: Heat Burst | Weather.com
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A heat burst is a rare phenomenon that usually occurs at night. It can raise temperatures by as much as 30 degrees in just a few minutes and cause damaging winds.

Jennifer Gray

ByJennifer Gray20 hours ago

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Imagine stepping outside at night and suddenly feeling like someone opened an oven door. That’s what it can feel like during a heat burst.

It's a rare and dramatic weather phenomenon where temperatures can spike by 10, 20 or even 30 degrees in just minutes, often in the middle of the night.

A heat burst happens when a thunderstorm starts to fall apart. Rain inside the storm begins to fall but evaporates before it hits the ground, cooling the air around it. That cooler, heavier air sinks quickly, but as it drops, it gets squeezed by pressure and heats up fast. By the time it reaches the ground, it’s no longer cool but suddenly hot, dry and often very windy.

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These bursts are typically short-lived, lasting just minutes, but they can be intense enough to damage crops, topple trees and even rip roofs off homes. Temperatures in a heat burst have been recorded jumping from the 70s to over 100 degrees in the dead of night, with wind gusts as strong as 80 to 100 mph.

According to the National Weather Service, a heat burst occurred in Wichita, Kansas just after midnight on June 9, 2011. The temperature rose from 85 degrees to 102 in just 20 minutes!

While heat bursts are rare, they tend to happen during the warmer months. They’re a striking reminder of just how fast and dramatic weather can change, even in the dead of night when the storms seem to be winding down.

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An example of a heat burst that happened on May 25, 2025, in Oklahoma. Chickasha saw its temperature spike to 96 degrees early in the morning just before sunrise.

Jennifer Gray is a weather and climate writer for weather.com. She has been covering some of the world's biggest weather and climate stories for the last two decades.