要爆炸了

is about to explode

→ 要
phrase Rare #23,833
is about to explode Used to warn that something is on the verge of exploding. 要 indicates that it is about to happen.
CH: 这个气球要爆炸了!
EN: This balloon is about to explode!

要爆炸了

I’m about to explode.

— 鬼童院 (2001)

要爆炸了!

It's going to explode!

— 镜子 (1975)

小姐,火车要爆炸了,快逃

Miss, the train is going to explode—run!

— 起风了 (2013)

引擎要爆炸了

The engine is about to explode.

— 风之谷 (1984)