LRAD Emergency Siren Testing Scheduled for May 28 – 30, 2020

May 22, 2020 

From Thursday, May 28 through Saturday, May 30, Southern Marin Fire District and Mill Valley Fire Department will be testing the LRAD emergency sirens located throughout Mill Valley.  Please do not call 911 when you hear sirens on these test dates.

Testing is expected to be intermittent throughout each day, beginning at approximately 8 a.m. to 9 a.m.  The Fire teams will be conducting individual short testing at each of the five sirens (located in Cascade, Blithedale and Warner Canyons, plus Scott Valley and atop Mill Valley City Hall), with a variety of tones as well as length of tones to ensure maximum coverage in a real emergency. The team will also perform software upgrades, as well as system yearly readiness validation. Depending on need, the teams may also choose to perform full volume testing at each site.  

We appreciate the community’s support and understanding during these test dates to ensure our LRAD emergency sirens are ready and functioning optimally for the upcoming wildfire season. 

In 2019 the City of Mill Valley installed new and more powerful emergency sirens to replace our aging system. These sirens are known as “LRADs” – Long Range Acoustic Devices - and they project both siren and voice recordings to alert and inform community members during a large-scale disaster. At the time of installation, these new sirens were the first land-based LRAD system in Marin County.

The LRAD system improves the resiliency and redundancy of our communication systems. LRAD systems are highly effective in communicating warnings, instructions, and notifications throughout incident sites and over vast areas during life-threatening events.

In the event of a disaster or large-scale emergency, one or all of the sirens may be activated to alert residents to tune into local media (City website, social media, radio and television stations) for further information and instructions. 

Please do not call 911 when you hear sirens on these test dates. Use 911 for life-threatening emergencies only.  If you hear the siren at any other time than a scheduled testing date, tune in to KQED 88.5FM, KCBS 740 AM, or KGO 810 AM and local TV stations for further information.