Add Yahoo as a preferred source to see more of our stories on Google. An emergency alert test message from South Pasadena was accidentally sent to an estimated 10 million mobile phones across Los ...

Emergency alert systems send messages quickly so people can act fast in dangerous situations.The best systems in 2026 use smart technology ...

Phones across Los Angeles County and elsewhere rang out Tuesday night, Nov. 11, when a test alert mistakenly was sent by South Pasadena officials to a much larger geographic area than they intended.

Fort Worth changed its emergency alert system, and you might not be signed up anymore. Here’s how to check before the next statewide test.