This is the 4458th most frequent Korean word.
화재가
"화재가" means "fire breaks out" or "a fire occurs" in English.
In this context, '화재가' refers to 'a fire' as the subject of the sentence.
화재가 발생했습니다.
A fire has occurred.
Here, '화재가' is the subject, meaning 'the fire' that caused significant effects.
화재가 큰 피해를 입혔습니다.
The fire caused great damage.
This use of '화재가' describes the fire, which is now controlled or put out.