San Mateo County Alert System image SMC ALERT
SMC ALERT is an alert notification system available in all cities and towns in San Mateo County used to immediately contact you during urgent or emergency situations. You can set alerts to send emergency and non-emergency text and voice messages to your:

  • email account(s)
  • cell phone/smartphone, tablet
  • landline phone

SMC ALERT is free (your carrier may charge you a fee to receive alerts on your wireless device). To receive alerts automatically, you will need to register with the system.

For more information and to register, visit the SMC Alert page at



Get live updates on threats from fires, floods, earthquakes and other emergencies with a localized code 

Know Your Zone – Here’s how it works:

Emergency managers have carved the Peninsula into more than 300 zones on an online, publicly available map supported by Zonehaven, a California-based company under contract with the County of San Mateo. Each zone is assigned a short code. All residents can enter an address to find their zone.

All San Mateo County residents are urged to look up their zone for their home, work and school and to write the zones down where the codes are easily found.

In the event of an emergency, the Zonehaven platform will be updated with real-time evacuation routes and other information. Fire departments and other first-responding agencies across the county will update the platform so evacuation routes and other information is timely and localized.

Relevant additional data is fed into the map, showing risks over zones, such as the incident location, wind speeds and directions. The Zonehaven platform is a digital application that can be accessed on a smartphone, computer or tablet, and interfaces with real-time GPS-guided traffic maps available through applications such as Waze.

Residents are encouraged to follow their local emergency responders on real-time social media platforms and to sign up for SMC Alert, a free service that sends emergency and non-emergency text and voice messages to:

► Email accounts
► Cell phones, smartphones, tablets
► Landline phones, home and work