Emporium · Photo: Bobak Ha'Eri · CC BY 3.0More hazard damage per building is expected in Jamestown than in 98% of U.S. towns, mostly from wildfire
On FEMA’s National Risk Index, Jamestown gets a D− for hazard risk: higher expected damage per building than 98% of U.S. towns, #741 of 847 in California. Most of that expected damage is wildfire (50%), then river and rain flooding (49%). FEMA’s files show no paid flood insurance claims here.
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 Jamestown faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
Wildfire
River and rain flooding
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 Jamestown’s grade
Wildfire is 50% of the building damage FEMA expects in Jamestown, and Jamestown’s rate of wildfire damage is in the top 1% of U.S. census tracts. River and rain flooding adds 49%, at a rate in the top 5% of U.S. census tracts.
D− #741 of 847 in California; higher expected damage per building than 98% of U.S. towns (21,298).
Jamestown’s residents live in 2 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, Jamestown has more expected damage per building than 87% of California towns.
In dollars, FEMA expects about $3.6M a year in losses across Jamestown: $3.2M to buildings, the rest to people and crops.
Does Jamestown flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Jamestown. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Jamestown isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Tuolumne County.1 federal disaster brought FEMA money to Jamestown
Disasters that paid out in Jamestown itself (aid to households or repair grants to Jamestown), newest first, with that year’s flood claims.
- 2023Severe Winter Storms, Straight-line Winds, Flooding, Landslides, and Mudslides189 households applied for aid$661K aid approved
Tuolumne 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 2 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in Tuolumne County, 2013–2026.
Old photos of Jamestown after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Jamestown archive →Jamestown and its neighbors
Jamestown 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 |
|---|---|---|---|
| Sonora | C−more damage than 77% | river and rain flooding | 6 |
| Jamestown | D−more damage than 98% | wildfire | 0 |
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 Jamestown faces
A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.
- 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.
- 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.
- 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 Jamestown
Is Jamestown at risk for natural disasters?
On FEMA’s National Risk Index, Jamestown has higher expected damage per building than 98% of U.S. towns: D− for hazard risk, #741 of 847 in California. Most of the expected damage is wildfire (50%) and river and rain flooding (49%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Is Jamestown 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 Tuolumne County, 24% of homes in mapped flood zones carry federal flood insurance, and 0.1% of all homes do.
How much is flood insurance in Jamestown?
FEMA’s Community Rating System list shows no discount for Jamestown’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 Jamestown?
By FEMA money that reached Jamestown, Severe Winter Storms, Straight-line Winds, Flooding, Landslides, and Mudslides (2023): 189 households applied for aid, $661K approved.
Is Jamestown at risk from wildfire?
It is the largest share of the building damage FEMA expects here (50%), and Jamestown’s rate for it is in the top 1% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Jamestown.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Jamestown’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.