Outdoor Warning Sirens
An Emergency Outdoor Warning Siren System is an all-hazards siren system used to warn the general population of potential danger. During an emergency, the sirens will be activated for 3 minutes.
What Do the Sirens Mean?
Alert: A single tone signifying an emergency alert. This signal may be used to inform the community of an emergency or disaster, including a severe storm, tornado warning (not a tornado watch), earthquake, chemical hazard/hazardous material incident, extreme winds, or biological hazard.
All Clear: Riverside does not use an All Clear signal. Tune in to your local news agencies and listen for notification from city officials regarding the emergency.
Siren Test Times
Sirens are tested on the first Tuesday of each month at 10 a.m.
What Should I Do if I Hear the Sirens?
If the sirens are activated - and it is not a monthly siren test - the public should see it as a signal to
Tune in to radio or television to get information about the type of emergency and instructions and recommendations
Listen to your local media for indications that the emergency is over
The public should not call 9-1-1 unless they have an actual emergency.