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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/

Residents Guide to Wildfire Preparedness & Evacuation

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Registration

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Preparing for a Power Outage

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.

Frequently Asked

How do I register my phone?

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

How do I contact CWS?

By phone: 925-655-0111

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

By mail: 1850 Muir Road, Martinez, CA 94553

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CONTACT US

COMMUNITY WARNING SYSTEM
Contra Costa County Office of the Sheriff
Emergency Services Division
By phone: 925-655-0111
By e-mail: cws-staff@so.cccounty.us
By mail: 1850 Muir Road , Martinez, CA 94553

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

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