1A large destructive fire (conflagration) occurring in buildings, forests, etc.; a fire that causes wide-ranging damage.
昨夜、近所で大きな火災があり、多くの家が焼けた。
There was a large fire in the neighborhood last night, and many houses burned down.
火災報知器が鳴ったらすぐに避難してください。
If the fire alarm sounds, evacuate immediately.
火災の原因は調査中だ。
The cause of the fire is under investigation.