FEMA Updates Flood Maps in Colusa County, Colusa and Williams

Release Date Release Number
Release Date:
January 25, 2023

OAKLAND, Calif. — The Federal Emergency Management Agency (FEMA) has delivered preliminary flood maps for unincorporated Colusa County and the cities of Colusa and Williams. The maps identify revised flood hazards along the Sacramento River, Stone Corral Creek near Maxwell, Salt Creek at Williams, and two reaches of Elk Creek. The new maps will help building officials, contractors and homeowners make effective mitigation decisions, thereby contributing to safer and more disaster resilient communities.

Before the new Flood Insurance Rate Maps (FIRMs) become effective, there is a 90-day appeal period from Jan. 25, 2023 to Apr. 26, 2023. During that time, residents or businesses with supporting technical and scientific information, such as detailed hydraulic or hydrologic data, can appeal the flood risk information on the preliminary maps, which can be viewed at fema.gov/preliminaryfloodhazarddata.

Flood hazards are dynamic and change frequently for many reasons, including weather patterns, erosion and community development. Officials from FEMA, Colusa County and the cities of Colusa and Williams worked together to provide updated information that accurately reflects the flood risk. These changes may also affect future building standards or insurance requirements.

The local mapping project is part of a national effort led by FEMA to increase local knowledge of flood risks and support actions to address and reduce the effects of flooding on new and improved structures. FEMA encourages residents to review the preliminary flood maps to learn about local flood risks, potential future flood insurance requirements and identify any concerns or questions about the information provided.

Risk of flooding affects almost every corner of the nation. In total, 98% of counties have experienced a flood event, which makes floods the most common and widespread of all weather-related natural disasters.

For more information, contact Colusa County at (530) 458-0466 or Colusacountydpw@countyofcolusa.com. Other community information is available for the city of Colusa at (530) 458-4740 or citymanager@cityofcolusa.com, and Williams at (530) 235-3279 or kramsaur@cityofwilliams.org.


FEMA’s mission is helping people before, during, and after disasters. Follow FEMA Region 9 online at twitter.com/femaregion9.

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