Mt. San Antonio College students participated in an active-shooter mass-casualty drill, simulating emergency response, triage and patient transport as part of a regional preparedness exercise.
People in government offices, businesses and schools across Southern California stopped everything for a minute Thursday to "drop, cover and hold on" during a statewide earthquake drill.
Millions of residents statewide participated in the 12th annual Great California Shakeout earthquake drill on Thursday.
The annual Great California ShakeOut aims to improve earthquake preparedness, and this year, a new early warning system was tested at Los Angeles City Hall as part of the drill.
This is why you may have gotten a notification from the White House on Wednesday.
The Los Angeles International Airport turned off the power in some terminals last night to test its emergency systems.