what fire tornado
They can consist of a whirlwind of hot air around or within the flames or a vortex of fire itself. Also known as âfire devilsâ or âfire whirlsâ, they can uproot trees up to 49 ft (15m). Fire tornadoes are usually 30-200ft (10-50m) and a few meters wide, and last only a few minutes. But some of the largest can be more than a half a mile tall, contain winds over 100mph, and persist for more than 20 minutes.