On FEMA’s figures, Dillonvale faces less hazard damage per building than 67% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Dillonvale gets a B+ for hazard risk: lower expected damage per building than 67% of U.S. towns, #652 of 993 in Ohio. Most of that expected damage is river and rain flooding (76%), then tornadoes (16%). Flood insurance has paid 1 claim here since 1978.
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 Dillonvale 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
Tornadoes
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 Dillonvale’s grade
River and rain flooding is 76% of the building damage FEMA expects in Dillonvale, and Dillonvale’s rate of river and rain flooding damage is lower than 51% of U.S. census tracts. Next is tornadoes at 16% (higher than 88% of U.S. census tracts).
B+ #652 of 993 in Ohio; lower expected damage per building than 67% of U.S. towns (21,298).
Dillonvale’s residents live in 4 census tracts; FEMA’s figures are combined by where they live.
The typical Ohio town has lower expected damage than 79% of U.S. towns; within the state, Dillonvale has more expected damage per building than 66% of Ohio towns.
In dollars, FEMA expects about $775K a year in losses across Dillonvale: $481K to buildings, the rest to people and crops.
Does Dillonvale flood? Rarely: 1 flood claim since 1978
Every paid claim on a federal flood insurance policy in Dillonvale, from FEMA’s records: 0.6 per 1,000 homes, fewer than 87% of the 13,809 U.S. towns with a flood insurance record.
Dillonvale isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Hamilton County.The storms Dillonvale remembers
None of the 16 disasters declared for Hamilton County shows FEMA aid or repair money reaching Dillonvale itself in FEMA’s records, so these are its biggest flood-claim years.
- 19781 flood claims paidThe year of Blizzards and Snowstorms, declared for Hamilton County
Hamilton 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.
Old photos of Dillonvale after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Dillonvale archive →Dillonvale and its neighbors
Dillonvale is 5th of the 6 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 |
|---|---|---|---|
| Deer Park | Aless damage than 92% | river and rain flooding | — |
| Sycamore Township | Aless damage than 88% | river and rain flooding | 6 |
| Rossmoyne | Aless damage than 85% | river and rain flooding | — |
| Amberley | A−less damage than 81% | river and rain flooding | 17 |
| Dillonvale | B+less damage than 67% | river and rain flooding | 1 |
| Reading | C+more damage than 64% | river and rain flooding | 13 |
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 Dillonvale 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.
- Pick your spot now: the lowest floor, an inside room, no windows.
- A watch means be ready; a warning means take cover now.
- Keep shoes and a flashlight by the bed.
- 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 Dillonvale
Is Dillonvale at risk for natural disasters?
On FEMA’s National Risk Index, Dillonvale has lower expected damage per building than 67% of U.S. towns: B+ for hazard risk, #652 of 993 in Ohio. Most of the expected damage is river and rain flooding (76%) and tornadoes (16%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Dillonvale flood?
Flood insurance has paid 1 claim in Dillonvale since 1978, $375 in all, or 0.6 per 1,000 homes, fewer than 87% of U.S. towns with a flood insurance record.
Is Dillonvale 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 Hamilton County, 24% of homes in mapped flood zones carry federal flood insurance, and 0.4% of all homes do.
How much is flood insurance in Dillonvale?
FEMA’s Community Rating System list shows no discount for Dillonvale’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Is Dillonvale at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (76%), and Dillonvale’s rate for it is lower than 51% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Dillonvale.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Dillonvale’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.