Photo: Greg Hume · CC BY-SA 4.0FEMA puts Mariemont’s expected hazard damage per building above that of 80% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Mariemont gets a C− for hazard risk: higher expected damage per building than 80% of U.S. towns, #954 of 993 in Ohio. Most of that expected damage is river and rain flooding (88%). 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 Mariemont 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 Mariemont’s grade
River and rain flooding is 88% of the building damage FEMA expects in Mariemont, and Mariemont’s rate of river and rain flooding damage is higher than 88% of U.S. census tracts. Next is tornadoes at 8% (higher than 88% of U.S. census tracts).
C− #954 of 993 in Ohio; higher expected damage per building than 80% of U.S. towns (21,298).
Mariemont’s residents live in 2 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, Mariemont has more expected damage per building than 96% of Ohio towns.
In dollars, FEMA expects about $2.0M a year in losses across Mariemont: $1.7M to buildings, the rest to people and crops.
Does Mariemont flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Mariemont. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Mariemont 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.1 federal disaster brought FEMA money to Mariemont
Disasters that paid out in Mariemont itself (aid to households or repair grants to the Village of Mariemont), newest first, with that year’s flood claims.
- 2008Severe Wind Storm Associated with Tropical Depression Ike$81K to the Village of Mariemont for repairs
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 Mariemont after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Mariemont archive →Mariemont and its neighbors
Mariemont is 6th 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 |
|---|---|---|---|
| Anderson Township | A−less damage than 79% | river and rain flooding | 45 |
| Cincinnati | A−less damage than 78% | river and rain flooding | 723 |
| The Village of Indian Hill | Bless damage than 64% | river and rain flooding | — |
| Columbia Township | Bless damage than 59% | river and rain flooding | — |
| Fairfax | Bless damage than 56% | river and rain flooding | 56 |
| Mariemont | C−more damage than 80% | river and rain flooding | 0 |
| Plainville | — | 100 residents; we grade 1,000+ | |
| Madison Place | — | 815 residents; we grade 1,000+ | |
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 Mariemont 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 Mariemont
Is Mariemont at risk for natural disasters?
On FEMA’s National Risk Index, Mariemont has higher expected damage per building than 80% of U.S. towns: C− for hazard risk, #954 of 993 in Ohio. Most of the expected damage is river and rain flooding (88%) and tornadoes (8%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Is Mariemont 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 Mariemont?
FEMA’s Community Rating System list shows no discount for Mariemont’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 Mariemont?
By FEMA money that reached Mariemont, Severe Wind Storm Associated with Tropical Depression Ike (2008): $81K to the Village of Mariemont for repairs.
Is Mariemont at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (88%), and Mariemont’s rate for it is higher than 88% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Mariemont.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Mariemont’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.