IPA: /ˈfaɪərˌstɔːrm/
KK: /ˈfaɪərˌstɔrm/
A large and intense fire that creates strong winds and can cause significant destruction, or a strong emotional reaction to a situation.
The firestorm caused by the wildfire destroyed several homes in the area.
Firestorm is formed from "fire" (from Old English "fyr", meaning flame or burning) and "storm" (from Old English "storm", meaning a violent disturbance of the atmosphere). The word describes a violent and intense storm of fire, often associated with wildfires or intense heat.
Imagine a fierce 'storm' of 'fire' raging through an area — that's what a firestorm is.
No commonly confused words.