Natural hazards · Walnut

Walnut, OH natural hazards

Most of the natural-hazard damage FEMA expects in Walnut comes from inland flooding, and overall the risk is low for a U.S. community.

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

Expected damage

How exposed is Walnut?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Walnut to be higher than in 27% of U.S. communities, mostly from inland flooding and heat waves.

Inland flooding67%Heat waves17%Everything else16%

By hazard

What Walnut faces

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

Inland flooding

67% of expected damage

Above average · higher than 52% of U.S. places

Recorded about 3 times a year in the area

Heat waves

17% of expected damage

Well above average · higher than 76% of U.S. places

Recorded about 5 times a year in the area

Lower here

HurricanesTornadoesHailIce stormsWinter weatherCold 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 Walnut flood?

FEMA's records show no paid flood insurance claims in Walnut.

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Gallia County.

Disasters that hit Walnut

Federal disasters declared here

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

Brought FEMA money into WalnutDeclared for Gallia County only

Gallia County has had 13 natural disasters declared since 1953, most often severe storms and floods.

Around Walnut

Walnut and the towns around it

Very lowLowModerateHighVery high

Symmesmostly inland floodingVery high

Harrisonmostly inland floodingVery high

Masonmostly inland floodingHigh

Walnutmostly inland floodingLow

Perrymostly 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. Walnut is smaller than a census tract, so it shares the figures of the tract around its center.

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

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.