Natural hazards · Union

Union, OH natural hazards

Most of the natural-hazard damage FEMA expects in Union comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 35 claims here since 1995.

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

Expected damage

How exposed is Union?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Union to be higher than in 29% of U.S. communities, mostly from inland flooding.

Inland flooding69%Tornadoes11%Cold waves8%Everything else11%

By hazard

What Union faces

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

Inland flooding

69% of expected damage

Below average · higher than 49% of U.S. places

Recorded about 3 times a year in the area

Tornadoes

11% of expected damage

Above average · higher than 71% of U.S. places

Recorded about once every 80 years in the area

Cold waves

8% of expected damage

Above average · higher than 62% 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 Union flood?

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

35paid claims since 1995

$517Kpaid to owners

0homes flooded more than once

19952026

Biggest named events

March storm: 11 claims, $196K

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Warren County.

What’s been done with FEMA grants

1storm safe rooms built

Disasters that hit Union

Federal disasters declared here

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

Brought FEMA money into UnionDeclared for Warren County only

Warren County has had 11 natural disasters declared since 1953, most often severe storms and floods.

Around Union

Union and the towns around it

Very lowLowModerateHighVery high

Salemmostly inland floodingHigh

South Lebanonmostly inland floodingModerate

Unionmostly inland floodingLow

Hamiltonmostly inland floodingLow

Lebanonmostly inland floodingLow

Turtlecreekmostly inland floodingVery low

Deerfieldmostly inland floodingVery low

Masonmostly inland floodingVery low

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. Union covers 1 census tract, combined by population.

Money that reached townFlood claims are matched to Union’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to the Township of Union. 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 Union total about $3.2M 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.