Photo: Nyttend · Public domainTwin Township’s building-damage rate from tornadoes is in the top 3% of U.S. census tracts
On FEMA’s National Risk Index, Twin Township gets a B− for hazard risk: lower expected damage per building than 53% of U.S. towns, #790 of 993 in Ohio. Most of that expected damage is river and rain flooding (70%), then tornadoes (20%). Flood insurance has paid 1 claim here since 1999.
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 Twin Township 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
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 Twin Township’s grade
River and rain flooding is 70% of the building damage FEMA expects in Twin Township, and Twin Township’s rate of river and rain flooding damage is higher than 53% of U.S. census tracts. Tornadoes add 20%, at a rate in the top 3% of U.S. census tracts.
B− #790 of 993 in Ohio; lower expected damage per building than 53% of U.S. towns (21,298).
All of Twin Township’s residents live in one census tract; the figures are that tract’s.
The typical Ohio town has lower expected damage than 79% of U.S. towns; within the state, Twin Township has more expected damage per building than 80% of Ohio towns.
In dollars, FEMA expects about $1.0M a year in losses across Twin Township: $717K to buildings, the rest to people and crops.
Does Twin Township flood? Rarely: 1 flood claim since 1999
Every paid claim on a federal flood insurance policy in Twin Township, from FEMA’s records: 1.0 per 1,000 homes, fewer than 78% of the 13,809 U.S. towns with a flood insurance record.
Twin Township isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Preble County.The storms Twin Township remembers
None of the 8 disasters declared for Preble County shows FEMA aid or repair money reaching Twin Township itself in FEMA’s records, so these are its biggest flood-claim years.
- 19991 flood claims paidNo declaration for the county that year
Preble County has had 8 natural disasters declared by the President since 1953, most often severe storms, then winter storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Twin Township after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Twin Township archive →Twin Township and its neighbors
Twin Township is 5th of the 5 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 |
|---|---|---|---|
| Perry Township | Aless damage than 90% | river and rain flooding | 2 |
| Harrison Township | B+less damage than 70% | river and rain flooding | 7 |
| Washington Township | Bless damage than 64% | river and rain flooding | — |
| Lanier Township | B−less damage than 55% | river and rain flooding | 2 |
| Twin Township | B−less damage than 53% | river and rain flooding | 1 |
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 Twin Township 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.
- 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 Twin Township
Is Twin Township at risk for natural disasters?
On FEMA’s National Risk Index, Twin Township has lower expected damage per building than 53% of U.S. towns: B− for hazard risk, #790 of 993 in Ohio. Most of the expected damage is river and rain flooding (70%) and tornadoes (20%). The figures are for the one census tract the town shares with its neighbors. This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Twin Township flood?
Flood insurance has paid 1 claim in Twin Township since 1999, $674 in all, or 1.0 per 1,000 homes, fewer than 78% of U.S. towns with a flood insurance record.
Is Twin Township 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 Preble County, 15% of homes in mapped flood zones carry federal flood insurance, and 0.5% of all homes do.
How much is flood insurance in Twin Township?
FEMA’s Community Rating System list shows no discount for Twin Township’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Is Twin Township at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (70%), and Twin Township’s rate for it is higher than 53% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Twin Township.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Twin Township’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.