But one thing remained silent through the commotion: the city’s emergency siren ... San Francisco’s Department of Emergency Management said that while that morning’s tsunami warning was ...

While some people along Ocean Beach in San Francisco heard fire engines with lights and sirens, most people in the city only got the alert of a tsunami warning on their phones and moved to higher ...

Many did get an alert after the quake, but it turns out a critical warning system in San Francisco was not working. Amanda Hari reports.

The 85 outdoor warning sirens around Harris Nuclear Plant will be tested for five to 30 seconds between 10 a.m. and 11 a.m. on Wednesday, Jan. 8, as scheduled. The 85 outdoor warning sirens around ...