firestorm; fire whirl
A large, intense fire that creates its own wind system, often associated with wildfires or large-scale urban fires. The cross-reference 火災旋風 is a synonym.
See also: 火災旋風
A firestorm occurred in the large-scale forest fire.
A firestorm is caused by intense updrafts generated by the fire.
Synonym; 火災旋風 is more common in technical contexts, while 火事旋風 is a variant with the same meaning.
Compound of 火事 (fire) and 旋風 (whirlwind). The exact historical derivation is uncertain, but the term likely arose in modern fire science or journalism.