When there's a fire, follow the teachers' instructions, leave the classroom quickly and use a piece of cloth to cover your mouth and nose so that you don't breathe in smoke.

发生火灾时，按照老师的指示，迅速离开教室，用一块布遮住口鼻，以免吸入烟雾。

youdao

There's a fire in the room.

这屋里有火。

《新英汉大辞典》

A: fire There's a fire.

甲：失火了！

youdao

"That's really the biggest issue. When there is really a big sudden fire, the time to evacuate is extremely limited and extremely dangerous.

VOA: standard.2009.06.24

There's even a Latin-style arrangement that features Earth Wind and Fire's Reggie Young on trombone.

VOA: standard.2010.04.12

As it was put today - there's a fire alarm going off but we now need to find the fire.

BBC: RAMI: Ropey And Muddled Information?

There's a fire pit in the backyard for evening cigars and drinks.

WSJ: Southern Living in the Round

For most people, knowing they're running late for work strikes the fear of God within them and as a result, they move like there's a fire under their feet to get ready.

CNN: Twelve amusing excuses for being late to work