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Extreme Weather Information

Typically, the fire season in California starts at the beginning of May and runs through November.

The National Weather Service may issue Red Flag Warnings due to extreme weather conditions. To check if any red flag warnings are in effect for your area please go to: https://www.weather.gov/mtr/

Frequently Asked

How do I register my phone?

You can register your mobile device through our Registration Page or by clicking the red registration button available on all of our pages on the right side of the screen.

How do I contact CWS?

By phone: 925-313-9622

By e-mail: cws-staff@so.cccounty.us

By mail: 50 Glacier Drive, Martinez, CA 94553

Can I request a speaker?

Yes, you can request a CWS speaker by filling out this form.

Can I order brochures?

Yes, you can order CWS brochures by filling out this form.

Residents Guide to Wildfire Preparedness & Evacuation

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GET ALERTS ON YOUR CELL PHONE

CWS can alert residents and businesses within Contra Costa County that are impacted by, or are in danger of being impacted by an emergency.
The CWS message will include basic information about the incident and what specific protective actions (shelter in place, lockdown, evacuate, avoid the area, etc.) are necessary to protect life and health.
CWS is generally not used for traffic notifications or other non-life threatening incidents.

We would like to hear from you! Please visit our Feedback Page and submit any questions or concerns.

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CONTACT US

COMMUNITY WARNING SYSTEM
Contra Costa County Office of the Sheriff
Emergency Services Division
By phone: 925-313-9622
By e-mail: cws-staff@so.cccounty.us
By mail: 50 Glacier Drive, Martinez, CA 94553

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CWS is a partnership of County departments, Community Organizations, Industry and the Media

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