Atascadero Printery · Photo: MoneyMattson · CC BY-SA 3.0FEMA puts Atascadero’s expected hazard damage per building above that of 91% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Atascadero gets a D for hazard risk: higher expected damage per building than 91% of U.S. towns, #361 of 847 in California. Most of that expected damage is river and rain flooding (66%), then earthquakes (26%). Flood insurance has paid 26 claims here since 1982.
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 Atascadero 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
Wildfire
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 Atascadero’s grade
River and rain flooding is 66% of the building damage FEMA expects in Atascadero, and Atascadero’s rate of river and rain flooding damage is in the top 9% of U.S. census tracts. Wildfire adds 7%, at a rate in the top 4% of U.S. census tracts.
D #361 of 847 in California; higher expected damage per building than 91% of U.S. towns (21,298).
Atascadero’s residents live in 9 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, Atascadero has less expected damage per building than 57% of California towns.
In dollars, FEMA expects about $16.9M a year in losses across Atascadero: $15.4M to buildings, the rest to people and crops.
Does Atascadero flood? Sometimes: 26 flood claims since 1982
Every paid claim on a federal flood insurance policy in Atascadero, from FEMA’s records: 2.1 per 1,000 homes, fewer than 60% of the 13,809 U.S. towns with a flood insurance record.
- The California Atmospheric River9 claims · $666K
- The Pineapple Express - Southern3 claims · $27K
Atascadero isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: San Luis Obispo County.7 federal disasters brought FEMA money to Atascadero
Disasters that paid out in Atascadero itself (aid to households or repair grants to the City of Atascadero), newest first, with that year’s flood claims.
- 2023Severe Winter Storms, Straight-line Winds, Flooding, Landslides, and Mudslides84 households applied for aid$117K aid approved9 flood claims paid that year
- 2022Severe Winter Storms, Flooding, Landslides, and Mudslides466 households applied for aid$2.4M aid approved$892K to the City of Atascadero for repairs
- 2017Severe Winter Storms, Flooding, and Mudslides$9K to the City of Atascadero for repairs
- 2017Severe Winter Storms, Flooding, and Mudslides$13K to the City of Atascadero for repairs
- 2017Severe Winter Storms, Flooding, and Mudslides$9K to the City of Atascadero for repairs
- 2005Severe Storms, Flooding, Mudslides, and Landslides$22K to the City of Atascadero for repairs
Show all 7
- 2003Earthquake893 households applied for aid$1.7M aid approved$20.8M to the City of Atascadero for repairs
San Luis Obispo County has had 23 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.
Also 1 FEMA wildfire suppression grant (Fire Management Assistance, not a disaster declaration) for fires in San Luis Obispo County, 2016–2016.
Old photos of Atascadero after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Atascadero archive →Atascadero and its neighbors
Atascadero is 2nd of the 2 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 |
|---|---|---|---|
| Templeton | Dmore damage than 89% | river and rain flooding | — |
| Atascadero | Dmore damage than 91% | river and rain flooding | 26 |
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 Atascadero 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.
- Clear dead leaves and brush within 5 feet of the house.
- Sign up for local alerts and know two ways out.
- Keep N95 masks for smoky days.
- 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 Atascadero
Is Atascadero at risk for natural disasters?
On FEMA’s National Risk Index, Atascadero has higher expected damage per building than 91% of U.S. towns: D for hazard risk, #361 of 847 in California. Most of the expected damage is river and rain flooding (66%) and earthquakes (26%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Atascadero flood?
Flood insurance has paid 26 claims in Atascadero since 1982, $915K in all, or 2.1 per 1,000 homes, fewer than 60% of U.S. towns with a flood insurance record. 3 properties have flooded more than once. The most claims came from California Atmospheric River (9).
Is Atascadero 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 San Luis Obispo County, 22% of homes in mapped flood zones carry federal flood insurance, and 1.1% of all homes do.
How much is flood insurance in Atascadero?
FEMA’s Community Rating System list shows no discount for Atascadero’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 Atascadero?
By FEMA money that reached Atascadero, Earthquake (2003): 893 households applied for aid, $1.7M approved, and $20.8M to the City of Atascadero for repairs. By flood claims, California Atmospheric River: 9 paid, $666K.
Is Atascadero at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (66%), and Atascadero’s rate for it is in the top 9% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Atascadero.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Atascadero’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.