San Mateo County, California Winter Storm – General Information and Emergency Alerts,

The County of San Mateo and surrounding region is experiencing a series of winter atmospheric river storm events. Please click here for information on how to get involved and be prepared in your community during a serious disaster.

County of San Mateo

400 County Center
Redwood City, CA 94063

Monday-Friday 8AM-5PM

Main Phone Number

650-363-4790

Beach Hotline

650-599-1266

During emergencies, public safety personnel are busy responding to urgent life and safety issues. Please refrain from calling 911 unless necessary.