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Natural hazards · Allegheny

Allegheny, PA natural hazards

Most of the natural-hazard damage FEMA expects in Allegheny comes from inland flooding, and overall the risk is very low for a U.S. community. Flood insurance has paid 86 claims here since 1978.

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

How exposed is Allegheny?

9
Very low
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Allegheny to be higher than in 9% of U.S. communities, mostly from inland flooding.

Inland flooding80%Tornadoes6%Hurricanes5%Everything else10%
By hazard

What Allegheny faces

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

Inland flooding

80% of expected damage
Below average · higher than 27% of U.S. places
Recorded about 2 times a year in the area

Tornadoes

6% of expected damage
Below average · higher than 46% of U.S. places

Hurricanes

5% of expected damage
Above average · higher than 64% of U.S. places
Recorded about once every 23 years in the area

Lower here

HailIce stormsWinter weatherCold wavesHeat wavesWildfireEarthquakesLandslidesStrong windLightning

Not a risk here

Coastal floodingDroughtAvalanchesTsunamisVolcanic 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 Allegheny flood?

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

86paid claims since 1978
$1.5Mpaid to owners
11homes flooded more than once
19782026

Biggest named events

  • Tropical Storm Ivan: 16 claims, $463K
  • Tropical Storm Lee: 1 claim, $7K
  • Tropical Storm Bill: 1 claim, $3K

Homes that flooded again and again

■ FEMA “severe repetitive loss” (1) ■ flooded 2+ times

of homes in flood zones
are insured
of all homes
are insured
No community discount. Allegheny isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Blair County.
Disasters that hit Allegheny

Federal disasters declared here

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

Brought FEMA money into AlleghenyDeclared for Blair County only
Blair County has had 16 natural disasters declared since 1953, most often floods and winter storms.
Around Allegheny

Allegheny and the towns around it

Duncansville: High, mostly inland floodingJuniata: Very low, mostly inland floodingLogan: Very low, mostly inland floodingBlair: Low, mostly inland floodingTunnelhill: Very low, mostly inland floodingFrankstown: Low, mostly inland floodingHollidaysburg: Low, mostly inland floodingCresson: Very low, mostly inland floodingAltoona: Very low, mostly inland floodingGallitzin: Very low, mostly inland floodingFreedom: Low, mostly inland floodingWashington: Very low, mostly inland floodingPortage: Very low, mostly inland floodingTyrone: Low, mostly inland floodingAntis: Moderate, mostly inland floodingDean: Very low, mostly inland floodingTaylor: Low, mostly inland floodingGallitzin: Very low, mostly inland floodingWoodbury: High, mostly inland floodingHuston: Very low, mostly inland floodingCatharine: High, mostly inland floodingMunster: Very low, mostly inland floodingAllegheny: Very low, mostly inland floodingAshville: Very low, mostly inland floodingAllegheny: Very low, mostly inland flooding AlleghenyDuncansvilleJuniataLoganBlairTunnelhillFrankstownHollidaysburgCressonAltoonaGallitzin
Very lowLowModerateHighVery high
Duncansvillemostly inland floodingHigh
Hollidaysburgmostly inland floodingLow
Frankstownmostly inland floodingLow
Blairmostly inland floodingLow
Juniatamostly inland floodingVery low
Loganmostly inland floodingVery low
Altoonamostly inland floodingVery low
Tunnelhillmostly inland floodingVery low
Gallitzinmostly inland floodingVery low
Alleghenymostly inland floodingVery low
Cressonmostly 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. Allegheny covers 1 census tract, combined by population.
Money that reached townFlood claims are matched to Allegheny’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Township of Allegheny. 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 Allegheny total about $1.4M 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.

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You’re in Allegheny, PABlair CountyView boundary

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/15 · 2025-01-01
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