Why do wildfires often intensify during the day?

Lower humidity and higher temperatures.

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  1. Lower humidity and higher temperatures ✔
  2. More oxygen at noon
  3. Cooler ground

Why: Daytime warmth lowers humidity and raises wind, increasing burn rates.

Huh, didn't know that: Daytime warmth lowers humidity and raises wind, increasing burn rates.

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Fires wake up with the sun!
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References

Answer: Lower humidity and higher temperatures. Daytime warmth lowers humidity and raises wind, increasing burn rates.

  1. Wildfire en.wikipedia.org/wiki/Wildfire
    Burn rates of smoldering logs are up to five times greater during the day
    Checked 2026-11-07.

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