Natural hazards · St. Clair

St. Clair, OH natural hazards

Most of the natural-hazard damage FEMA expects in St. Clair comes from inland flooding, and overall the risk is very high for a U.S. community. Flood insurance has paid 36 claims here since 1980.

FEMA National Risk Index, December 2025 · OpenFEMA claims, aid & declarations

Expected damage

How exposed is St. Clair?

Very high

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in St. Clair to be higher than in 82% of U.S. communities, mostly from inland flooding.

Inland flooding74%Tornadoes14%Cold waves7%Everything else6%

By hazard

What St. Clair faces

Each hazard’s share of the damage FEMA expects here, and how that compares with the rest of the country.

Inland flooding

74% of expected damage

Well above average · higher than 94% of U.S. places

Recorded about 3 times a year in the area

Tornadoes

14% of expected damage

Well above average · higher than 97% of U.S. places

Cold waves

7% of expected damage

Above average · higher than 59% of U.S. places

Recorded about 3 times a year in the area

Lower here

HurricanesHailIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesStrong windLightningDrought

Not a risk here

Coastal floodingAvalanchesTsunamisVolcanic activity

Flood risk changes street by street. Check a specific address on FEMA’s flood map, and ask about flood insurance before you buy.

Flood insurance claims

Does St. Clair flood?

Every paid claim on a federal flood insurance policy in St. Clair, from FEMA’s records.

36paid claims since 1980

$461Kpaid to owners

0homes flooded more than once

19802026

Biggest named events

March storm: 2 claims, $34K

of homes in flood zones
are insured

of all homes
are insured

No community discount. St. Clair isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Butler County.

Disasters that hit St. Clair

Federal disasters declared here

None of the disasters declared for Butler County shows FEMA aid or repair money reaching St. Clair itself in FEMA’s records.

Brought FEMA money into St. ClairDeclared for Butler County only

Butler County has had 12 natural disasters declared since 1953, most often severe storms and floods.

Around St. Clair

St. Clair and the towns around it

Very lowLowModerateHighVery high

New Miamimostly inland floodingVery high

St. Clairmostly inland floodingVery high

Woodsdalemostly inland floodingHigh

Trentonmostly inland floodingHigh

Rossmostly inland floodingHigh

Hamiltonmostly inland floodingModerate

Madisonmostly inland floodingModerate

Waynemostly inland floodingLow

Fairfieldmostly inland floodingLow

Hanovermostly inland floodingLow

About these numbers

How to read this page

An average, not a forecastFEMA’s National Risk Index estimates the damage 18 kinds of natural hazards cause in a typical year, from decades of records and models. A quiet decade can follow a bad year.

Compared by rate“Higher than N%” compares yearly damage as a share of what’s here, so a big city isn’t rated riskier just for having more buildings. St. Clair covers 2 census tracts, combined by population.

Money that reached townFlood claims are matched to St. Clair’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to the Township of St. Clair. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

FEMA’s expected losses across St. Clair total about $3.5M a year, counting buildings, people and crops.

Sources: FEMA National Risk Index (December 2025); 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. Census tracts: U.S. Census Bureau.