爆ばく発はつ火か災さい

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Meanings

1

noun

fire caused by explosion

Technical or news term for a fire that originates from an explosion, such as a gas explosion or bomb blast.

bomb, burst open, pop

発departure, discharge, publish

火fire

災disaster, calamity, woe

火か災さい
火災 is a general term for any fire disaster, while 爆発火災 specifies that the fire was caused by an explosion.
爆ばく発はつ
爆発 refers to the explosion itself, not the resulting fire.

Compound of 爆発 (explosion) + 火災 (fire disaster).