Photo: T71024 · CC BY-SA 3.0On FEMA’s figures, Rocklin faces about as much hazard damage per building as the typical U.S. town, mostly from river and rain flooding
On FEMA’s National Risk Index, Rocklin gets a B for hazard risk: lower expected damage per building than 58% of U.S. towns, #31 of 847 in California. Most of that expected damage is river and rain flooding (87%), then earthquakes (11%). Flood insurance has paid 19 claims here since 1980.
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 Rocklin 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 Rocklin’s grade
River and rain flooding is 87% of the building damage FEMA expects in Rocklin, and Rocklin’s rate of river and rain flooding damage is higher than 65% of U.S. census tracts. Next is earthquakes at 11% (higher than 76% of U.S. census tracts).
B #31 of 847 in California; lower expected damage per building than 58% of U.S. towns (21,298).
Rocklin’s residents live in 16 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, Rocklin has less expected damage per building than 96% of California towns.
In dollars, FEMA expects about $18.2M a year in losses across Rocklin: $17.5M to buildings, the rest to people and crops.
Does Rocklin flood? Sometimes: 19 flood claims since 1980
Every paid claim on a federal flood insurance policy in Rocklin, from FEMA’s records: 0.7 per 1,000 homes, fewer than 85% of the 13,809 U.S. towns with a flood insurance record.
Rocklin isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Placer County.1 federal disaster brought FEMA money to Rocklin
Disasters that paid out in Rocklin itself (aid to households or repair grants to the City of Rocklin), newest first, with that year’s flood claims.
- 2022Severe Winter Storms, Flooding, Landslides, and Mudslides$158K to the City of Rocklin for repairs
Placer County has had 16 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 7 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in Placer County, 2002–2022.
Old photos of Rocklin after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Rocklin archive →Rocklin and its neighbors
Rocklin has the lowest expected damage per building of the 5 graded towns here. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Rocklin | Bless damage than 58% | river and rain flooding | 19 |
| Lincoln | B−less damage than 54% | river and rain flooding | 5 |
| Loomis | B−less damage than 53% | river and rain flooding | 11 |
| Roseville | C+more damage than 57% | river and rain flooding | 259 |
| Granite Bay | Cmore damage than 68% | river and rain flooding | 99 |
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 Rocklin 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 Rocklin
Is Rocklin at risk for natural disasters?
On FEMA’s National Risk Index, Rocklin has lower expected damage per building than 58% of U.S. towns: B for hazard risk, #31 of 847 in California. Most of the expected damage is river and rain flooding (87%) and earthquakes (11%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Rocklin flood?
Flood insurance has paid 19 claims in Rocklin since 1980, $250K in all, or 0.7 per 1,000 homes, fewer than 85% of U.S. towns with a flood insurance record. 2 properties have flooded more than once.
Is Rocklin 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 Placer County, 43% of homes in mapped flood zones carry federal flood insurance, and 0.6% of all homes do.
How much is flood insurance in Rocklin?
FEMA’s Community Rating System list shows no discount for Rocklin’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 Rocklin?
By FEMA money that reached Rocklin, Severe Winter Storms, Flooding, Landslides, and Mudslides (2022): $158K to the City of Rocklin for repairs.
Is Rocklin at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (87%), and Rocklin’s rate for it is higher than 65% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Rocklin.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Rocklin’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.