From text alerts to a tornado siren, the city of Denver broadcasted three accidental emergency alerts in six months.

The ShakeAlert computer system that warns about the imminent arrival of shaking from earthquakes sent out a false alarm Thursday morning for a magnitude 5.9 quake in Carson City, Nevada, that never ...

LOS ANGELES – The ShakeAlert computer system that warns about the imminent arrival of shaking from earthquakes sent out a false alarm Thursday morning for a magnitude 5.9 temblor in Carson City, Nev., ...

Phones buzzed in the San Francisco Bay Area shortly after 8 a.m. Thursday with an urgent call to drop, cover and hold for a 5.9-magnitude earthquake in Nevada, just east of Lake Tahoe - an earthquake ...

Hackers breached Brazil’s emergency alert system and used the government’s civil defense platform to send millions of highest ...

A series of phone alerts and updates have been issued to Dubai residents and visitors over recent days due to the ongoing ...

A hacker who breached Brazil's national emergency alert system and pushed fake 'alien attack' warnings to millions of phones overnight has handed cybersecurity experts a working demonstration of a ...

A large police response was sent and a lockdown was issued after a panic alarm, which turned out to be a false alarm, was activated at Crystal Lake South High School Thursday evening.