An emergency alert or early warning sent to mobile phones, TV, email, etc., notifying people of urgent situations such as earthquakes, tsunamis, severe weather, or evacuation orders.
今朝、携帯に緊急速報が届いて避難所の情報が送られてきた。
This morning an emergency alert arrived on my phone with information about evacuation centers.
テレビの画面に大きく『緊急速報』と表示された。
The TV screen prominently displayed '緊急速報'.
自治体は緊急速報を使って住民に重要な指示を出した。
The municipality used emergency alerts to give important instructions to residents.