Natural hazards · Alton

Alton, IN natural hazards

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

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

Expected damage

How exposed is Alton?

Very high

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Alton to be higher than in 80% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding60%Tornadoes20%Strong wind7%Everything else14%

By hazard

What Alton faces

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

Inland flooding

60% of expected damage

Well above average · higher than 92% of U.S. places

Recorded about 2 times a year in the area

Tornadoes

20% of expected damage

Well above average · higher than 95% of U.S. places

Recorded about once every 11 years in the area

Strong wind

7% of expected damage

Well above average · higher than 88% of U.S. places

Recorded about 6 times a year in the area

Lower here

HurricanesHailIce stormsWinter weatherCold wavesHeat wavesWildfireEarthquakesLandslidesLightningDrought

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 Alton flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Crawford County.

Disasters that hit Alton

Federal disasters declared here

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

Brought FEMA money into AltonDeclared for Crawford County only

Crawford County has had 18 natural disasters declared since 1953, most often severe storms and floods.

Around Alton

Alton and the towns around it

Very lowLowModerateHighVery high

Altonmostly inland floodingVery high

Boonemostly inland floodingVery high

Ohiomostly inland floodingVery high

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. Alton 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 Alton’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Alton. 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.