Photo: Coro · CC BY-SA 3.0More hazard damage per building is expected in El Sobrante than in 98% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, El Sobrante gets a D− for hazard risk: higher expected damage per building than 98% of U.S. towns, #705 of 847 in California. Most of that expected damage is river and rain flooding (56%), then earthquakes (43%). Flood insurance has paid 1 claim here since 2017.
Graded on FEMA’s expected yearly building damage per dollar of building value (NRI v1.20, December 2025), weighted by where residents live; flood claims are shown, not graded. How hazard risk is graded
What El Sobrante faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
River and rain flooding
Earthquakes
Shares are of FEMA’s expected building damage, the measure the grade uses; ranks compare each hazard’s building-damage rate with all 85,154 U.S. census tracts. In FEMA’s terms, river and rain flooding is FEMA’s “Inland Flooding” (rivers and streams overflowing their banks, or rain overwhelming drainage). FEMA defines coastal flooding as high or rising tides and storm surge, so surge damage is counted there. Drought isn’t listed: FEMA counts its losses in crops only.
What’s behind El Sobrante’s grade
River and rain flooding is 56% of the building damage FEMA expects in El Sobrante, and El Sobrante’s rate of river and rain flooding damage is in the top 4% of U.S. census tracts. Earthquakes add 43%, at a rate in the top 3% of U.S. census tracts.
D− #705 of 847 in California; higher expected damage per building than 98% of U.S. towns (21,298).
El Sobrante’s residents live in 7 census tracts; FEMA’s figures are combined by where they live.
The typical California town has higher expected damage than 92% of U.S. towns; within the state, El Sobrante has more expected damage per building than 83% of California towns.
In dollars, FEMA expects about $13.4M a year in losses across El Sobrante: $11.2M to buildings, the rest to people and crops.
Does El Sobrante flood? Rarely: 1 flood claim since 2017
Every paid claim on a federal flood insurance policy in El Sobrante, from FEMA’s records: 0.2 per 1,000 homes, fewer than 98% of the 13,809 U.S. towns with a flood insurance record.
El Sobrante isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Contra Costa County.2 federal disasters brought FEMA money to El Sobrante
Disasters that paid out in El Sobrante itself (aid to households or repair grants to El Sobrante), newest first, with that year’s flood claims.
- 2022Severe Winter Storms, Flooding, Landslides, and Mudslides31 households applied for aid$132K aid approved
- 2005Severe Storms, Flooding, Mudslides, and Landslides4 households applied for aid$7K aid approved
Contra Costa County has had 17 natural disasters declared by the President since 1953, most often severe storms, then floods. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of El Sobrante after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the El Sobrante archive →El Sobrante and its neighbors
El Sobrante is 5th of the 5 graded towns here, from least expected damage per building to most. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Richmond | Dmore damage than 94% | earthquakes | 36 |
| Pinole | D−more damage than 97% | river and rain flooding | 4 |
| San Pablo | D−more damage than 97% | earthquakes | 43 |
| Rollingwood | D−more damage than 97% | earthquakes | 1 |
| El Sobrante | D−more damage than 98% | river and rain flooding | 1 |
Hazard risk = FEMA’s expected yearly building damage per dollar of building value, vs. the 21,298 U.S. towns we grade; the map is shaded by fifths of the same scale. Flood claims = paid federal flood insurance claims on record.
Get ready for what El Sobrante faces
A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.
- Turn around at flooded roads: a foot of moving water can carry off a car.
- Flood insurance usually takes 30 days to start, so buy it before the forecast.
- Keep papers and medicines up high, in a grab-and-go bag.
- Drop, cover and hold on.
- Strap tall furniture and the water heater to the wall.
- Know how to shut off the gas.
- Look up the address on FEMA’s flood map.
- Ask the seller or landlord whether it has ever flooded, and what flood insurance costs there.
- Get a flood insurance quote early: policies usually start 30 days after you buy.
Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.
Questions about natural hazards in El Sobrante
Is El Sobrante at risk for natural disasters?
On FEMA’s National Risk Index, El Sobrante has higher expected damage per building than 98% of U.S. towns: D− for hazard risk, #705 of 847 in California. Most of the expected damage is river and rain flooding (56%) and earthquakes (43%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does El Sobrante flood?
Flood insurance has paid 1 claim in El Sobrante since 2017, $3K in all, or 0.2 per 1,000 homes, fewer than 98% of U.S. towns with a flood insurance record.
Is El Sobrante in a flood zone?
Flood zones are drawn street by street, so the answer depends on the address: look it up on FEMA’s flood map. In Contra Costa County, 28% of homes in mapped flood zones carry federal flood insurance, and 0.9% of all homes do.
How much is flood insurance in El Sobrante?
FEMA’s Community Rating System list shows no discount for El Sobrante’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
What was the biggest storm in El Sobrante?
By FEMA money that reached El Sobrante, Severe Winter Storms, Flooding, Landslides, and Mudslides (2022): 31 households applied for aid, $132K approved.
Is El Sobrante at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (56%), and El Sobrante’s rate for it is in the top 4% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in El Sobrante.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where El Sobrante’s residents lived in the 2020 census; OpenFEMA: NFIP redacted claims, multiple-loss properties, community status book and residential penetration rates, housing assistance (owners and renters), public assistance funded projects, hazard mitigation properties and disaster declarations. Homes: Census ACS 2020–24. Preparedness tips: Ready.gov. FEMA’s model is an average of expected damage, not a forecast. How hazard risk is graded.