More hazard damage per building is expected in Grover Beach than in 85% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Grover Beach gets a C− for hazard risk: higher expected damage per building than 85% of U.S. towns, #216 of 847 in California. Most of that expected damage is river and rain flooding (67%), then earthquakes (25%). Flood insurance has paid 3 claims here since 1998.
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 Grover Beach 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
Tsunamis
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 Grover Beach’s grade
River and rain flooding is 67% of the building damage FEMA expects in Grover Beach, and Grover Beach’s rate of river and rain flooding damage is higher than 84% of U.S. census tracts. Tsunamis add 8%, at a rate in the top 1% of U.S. census tracts.
C− #216 of 847 in California; higher expected damage per building than 85% of U.S. towns (21,298).
Grover Beach’s residents live in 4 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, Grover Beach has less expected damage per building than 75% of California towns.
In dollars, FEMA expects about $5.2M a year in losses across Grover Beach: $4.9M to buildings, the rest to people and crops.
Does Grover Beach flood? Rarely: 3 flood claims since 1998
Every paid claim on a federal flood insurance policy in Grover Beach, from FEMA’s records: 0.5 per 1,000 homes, fewer than 89% of the 13,809 U.S. towns with a flood insurance record.
- The Pineapple Express - Southern2 claims · $15K
- The California Atmospheric River1 claim · $31K
Grover Beach 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.6 federal disasters brought FEMA money to Grover Beach
Disasters that paid out in Grover Beach itself (aid to households or repair grants to the City of Grover Beach), newest first, with that year’s flood claims.
- 2024Severe Winter Storms, Tornadoes, Flooding, Landslides, and Mudslides$16K to the City of Grover Beach for repairs
- 2023Severe Winter Storms, Straight-line Winds, Flooding, Landslides, and Mudslides9 households applied for aid$21K aid approved$43K to the City of Grover Beach for repairs1 flood claim paid that year
- 2022Severe Winter Storms, Flooding, Landslides, and Mudslides46 households applied for aid$142K aid approved$152K to the City of Grover Beach for repairs
- 2010Severe Winter Storms, Flooding, and Debris and Mud Flows$4K to the City of Grover Beach for repairs
- 2005Severe Storms, Flooding, Mudslides, and Landslides$19K to the City of Grover Beach for repairs
- 2003Earthquake16 households applied for aid$15K aid approved
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 Grover Beach after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Grover Beach archive →Grover Beach and its neighbors
Grover Beach has the lowest expected damage per building of the 4 graded towns here. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Grover Beach | C−more damage than 85% | river and rain flooding | 3 |
| Pismo Beach | Dmore damage than 86% | river and rain flooding | 8 |
| Oceano | Dmore damage than 88% | river and rain flooding | 2 |
| Arroyo Grande | Dmore damage than 89% | river and rain flooding | 25 |
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 Grover Beach 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.
- Strong shaking or a sudden drop in the sea means head for high ground now.
- Learn the tsunami route signs near the shore.
- Stay away until officials say it’s safe.
- 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 Grover Beach
Is Grover Beach at risk for natural disasters?
On FEMA’s National Risk Index, Grover Beach has higher expected damage per building than 85% of U.S. towns: C− for hazard risk, #216 of 847 in California. Most of the expected damage is river and rain flooding (67%) and earthquakes (25%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Grover Beach flood?
Flood insurance has paid 3 claims in Grover Beach since 1998, $45K in all, or 0.5 per 1,000 homes, fewer than 89% of U.S. towns with a flood insurance record. The most claims came from Pineapple Express - Southern (2).
Is Grover Beach 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 Grover Beach?
FEMA’s Community Rating System list shows no discount for Grover Beach’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 Grover Beach?
By FEMA money that reached Grover Beach, Severe Winter Storms, Flooding, Landslides, and Mudslides (2022): 46 households applied for aid, $142K approved, and $152K to the City of Grover Beach for repairs. By flood claims, Pineapple Express - Southern: 2 paid, $15K.
Is Grover Beach at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (67%), and Grover Beach’s rate for it is higher than 84% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Grover Beach.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Grover Beach’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.