San Diego County is home to three major active faults: the Rose Canyon Fault which runs along the coast, through downtown, Old Town and La Jolla and the San Jacinto and Elsinore faults, which run through the northern and eastern areas of the county.
Significant earthquakes along these faults could disrupt roadways, transportation, and services like water, gas and phone communication for weeks or months. Coastal areas are also at risk for tsunamis.
As part of the state s 2021 Don t Get Caught Off Guard campaign, county and state Office of Emergency Services officials are encouraging residents to update their emergency plan, register for local emergency alerts, and download an earthquake early warning app.