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Ross Valley Fire News

News from Ross Valley Fire Department, serving Fairfax, San Anselmo, Ross, and Sleepy Hollow in Marin county, CA.

Flood Warning Horns and Sirens: San Anselmo and Fairfax

San Anselmo Flood Horn

The Town of San Anselmo operates a Flood Warning Horn, located in the Town Hall tower.  The horn is audible from most areas subject to flooding.  The horn is sounded when flooding is imminent.  Town staff will sound the horn with 5 blasts, a pause, 5 blasts, a pause and 5 blasts.  If you hear the flood horn, move away flood prone areas.  Seek higher ground.

Fairfax Flood Siren

The Town of Fairfax maintains a Flood Warning Siren.  Protocol is to sound the flood siren when flooding is imminent, based on evaluation by town and emergency personnel.  When the siren is sounded, residents and merchants are advised to proceed immediately to a higher floor or to higher ground.  The Fairfax horn will also activate when the San Anselmo Horn is activated, even if the flood stage in Fairfax is lower than San Anselmo.


The "AlertMarin" Service is operated by the County of Marin Office of Emergency Servcies.  This notification system will be activated to send alert messages and critical evacuation information during floods and other emergencies using SMS messaging, email, and geographic locations.  Sign up today at www.AlertMarin.org.

When you hear a Flood Warning Siren or Horn, it does not mean come downtown to look at the creek, take photos, send a tweet, or move merchandise to higher areas.  It is too late to prepare at this time.  Seek higher ground immediately!

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Our Mission

To protect the lives, property and environment of Ross, San Anselmo, Sleepy Hollow and Fairfax through education, prevention and community service in a professional and caring manner that is fair, honest, respectful and ethical.

Contact Us

Ross Valley Fire Department
777 San Anselmo Avenue
San Anselmo, CA 94960 USA
Tel: (415) 258-4686

For Emergencies, Dial 9-1-1