火 Radical 86 — fire
huǒ (third tone, dipping)
fire
Radical 864 strokes1 characters
Also written 灬 — the same radical in a different position inside the character.
Where the shape comes from
A flame with sparks leaping off it: the two inner strokes are the burning tongue of fire, the two outer ones the sparks. Under a character the flame lies flat and becomes the four dots 灬, which is the fire hiding beneath 热, 点 and 照.