Millions of mobile phones will make a siren sound and receive a text message in the UK on Sunday afternoon for the test of a nationwide emergency alert system ...

JEANNETTE, Pa. (KDKA) — Around the country, many cities, towns, and municipalities have text message alert systems to keep their communities in the know. Soon, Jeannette will be implementing a text ...

From why you may not have received an alert to how to opt out of future emergency messages, here's everything you need to know ...

In an actual emergency, mobile phone masts in the surrounding area will broadcast an alert. Every compatible mobile phone or tablet on 4G and 5G networks and in range of a mast will receive the alert.