A fire disaster is a fire disaster, or a conflagration. Maybe you'll get to meet a sexy firefighter if things go well...
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
How did a fire disaster cause heavy floods?
I have to fill the hole made by the fire disaster by the end of today.
He cooked a steak in a frying pan without running the ventilation fan at 2AM and the fire alarm went off.