Storm flooding brings outside water into homes from rivers, creeks, storm drains and hillside runoff. It's treated as contaminated, and it's usually excluded from standard homeowners policies. Here's how that plays out in Sonoma, what to do right now, and how to reach an independent, licensed local provider. Call (628) 336-1777 any time, or use the form on this page.
Storm and flood damage in Sonoma: what we see
Sonoma Creek and Nathanson Creek can rise fast in heavy rain, and low spots in town see street flooding. The City of Sonoma has said it's preparing for heavy rain and flooding this winter, with a sandbag station at Depot Park (City of Sonoma).
The local picture
Where floodwater comes from. Knowing the local water sources helps you read warnings. Sonoma is shaped by Sonoma Creek and Nathanson Creek, plus street flooding in low spots.
Low ground and runoff. Elevation and slope determine whether water arrives as a flood or as runoff. Sonoma spans the floor of the Sonoma Valley, with wooded hills on either side.
Neighborhoods include the Plaza area, the east and west sides of town, and nearby valley communities. Conditions vary from street to street, so a provider should look at your specific home rather than assume.
What to do right now
- Follow SoCoAlert and official instructions, and leave early if told to.
- Don't walk or drive through floodwater.
- Once it's safe, turn off power to flooded areas, or have an electrician do it.
- Photograph water levels and damage before cleanup.
- Call your insurer (flood policy if you have one) and a restoration provider.
Want a local pro to take a look?It's free for homeowners and there's no obligation.
Sonoma checklist
- Keep gutters, drainage areas and storm drains clear.
- Sign up for SoCoAlert.
- Look up your address on FEMA's Flood Map Service Center.
- Keep important documents and valuables off lower floors.
- Ask your agent about flood insurance before you need it.
Local resources for Sonoma
- Permits: City of Sonoma (Permit Sonoma outside city limits)
- Emergency alerts: SoCoAlert, the County's free notifications
- Sandbags: Sonoma County sandbag locations, updated during weather events
- Contractor licenses: CSLB license check
How a provider handles it
Providers extract water and mud, remove porous materials the floodwater touched, clean and disinfect, and dry the structure with documented readings before rebuilding. For the full picture, read our complete guide and the deep dive Russian River flood stages. We also have a storm-season article: Burn-scar runoff flooding in Santa Rosa.
Before you hire anyone, check the license on the CSLB site. Here's how we vet providers.
Dealing with this right now?Tell us what's happening and we'll connect you with an independent local provider.
More for Sonoma
- Water damage in Sonoma: our full local page
- Storm and flood damage service
- Burst pipe water damage in Sonoma
- Crawlspace flooding in Sonoma
- Sewage backup cleanup in Sonoma
- Appliance and water heater leaks in Sonoma
- Same problem nearby: storm flooding in Glen Ellen & Kenwood, storm flooding in Petaluma, storm flooding in Santa Rosa
- Storm and flood damage in every Sonoma County town
Sources
- SoCoAlert sign-up
- Sonoma County sandbag locations
- FEMA Flood Map Service Center
- CDC: flood safety
- CSLB license check
Sources checked October 18, 2026.
Frequently asked questions
Is Sonoma preparing for El Niño flooding?
Yes. The city has asked residents to clear gutters and drains and announced its Depot Park sandbag station (City of Sonoma).
Does homeowners insurance cover flooding?
Standard policies typically exclude flood; flood insurance through the NFIP or private insurers may apply. See FloodSmart.gov.
Is floodwater dangerous?
Floodwater is treated as contaminated. Wear boots and gloves and follow CDC guidance.