jǐng​bào

alarm

警报 (警報) jǐng​bào
alarm noun
a physical signal, siren, or device used to warn of immediate danger such as a fire or air raid

The air raid siren suddenly went off.

alert noun
an official warning or a state of vigilance regarding a potential threat

The weather bureau issued a severe typhoon warning.

Frequency

Movie subtitles
30.3 per million appears in 9% of films
Written text
5.73 per million

Sources

Definitions
CC-CEDICT