An alert issued to warn people about an emergency situation (e.g., disaster, accident); an emergency warning.
昨夜、スマホに緊急警報が届いて驚いた。
Last night I was startled when an emergency alert arrived on my phone.
警察は緊急警報を出して付近の住民に避難を呼びかけた。
The police issued an emergency alert and urged nearby residents to evacuate.
地震の際は緊急警報をよく聞いて指示に従ってください。
In an earthquake, please listen carefully to emergency alerts and follow instructions.