Fire whirl
Whirlwind induced by and often composed of fire
A fire whirl, fire devil or fire tornado is a whirlwind induced by a fire and often (at least partially) composed of flame and/or ash. These start with a whirl of wind, often made visible by smoke, and may occur when intense rising heat and turbulent fire-caused wind conditions combine to form whirling eddies of air. These eddies can contract to a tornado-like vortex that ingests debris and combustible gases.
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