FloodZoneMap.org

Sonoma County, California Flood Zones

Check an Address in Sonoma County

Enter any address in Sonoma County, California to see its FEMA flood zone

Sonoma County Disaster History

Disaster Declarations
36
Flood/Coastal Disasters
10
Hurricane Disasters
1
Latest Disaster
SEVERE WINTER STORMS, FLOODING, LANDSLIDES, AND MUDSLIDES (2023-03-09)

Source: OpenFEMA Disaster Declarations Summaries.

Recent Disaster Declarations in Sonoma County

DeclarationTypeDate
SEVERE WINTER STORMS, FLOODING, LANDSLIDES, AND MUDSLIDESFlood2023-03-09
SEVERE WINTER STORMS, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDESSevere Storm2023-02-21
SEVERE WINTER STORMS, FLOODING, AND MUDSLIDESFlood2023-01-08
SEVERE WINTER STORMS, FLOODING, LANDSLIDES, AND MUDSLIDESFlood2022-12-27
GLASS FIREFire2020-09-27
WILDFIRESFire2020-09-04
LNU LIGHTNING FIRE COMPLEXFire2020-08-17
WILDFIRESFire2020-08-14
COVID-19 PANDEMICBiological2020-01-20
COVID-19Biological2020-01-20

Flood Zone Types in Sonoma County

FEMA assigns flood zone designations to areas in Sonoma County, California:

AE High Risk — 1% annual chance of flooding. Insurance required.

VE Very High Risk — Coastal flooding with wave action.

X (Shaded) Moderate Risk — 500-year floodplain.

X Low Risk — Outside major floodplains.

View all flood zone types →

Flood Insurance in Sonoma County

Properties in Sonoma County, California that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.

Even outside high-risk zones, flood insurance is recommended. Over 20% of NFIP claims come from low and moderate-risk areas.

Visit FloodSmart.gov to find an agent and get a quote.