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Natural hazards · West Mifflin

West Mifflin, PA natural hazards

Most of the natural-hazard damage FEMA expects in West Mifflin comes from inland flooding, and overall the risk is very low for a U.S. community. Flood insurance has paid 21 claims here since 1980. 1 federal disaster brought FEMA money into town.

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

How exposed is West Mifflin?

7
Very low
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in West Mifflin to be higher than in 7% of U.S. communities, mostly from inland flooding.

Inland flooding73%Cold waves15%Everything else13%
By hazard

What West Mifflin faces

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

Inland flooding

73% of expected damage
Below average · higher than 28% of U.S. places
Recorded about 7 times a year in the area

Cold waves

15% of expected damage
Below average · higher than 38% of U.S. places
Recorded about 3 times a year in the area

Lower here

HurricanesTornadoesHailIce stormsWinter weatherHeat 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 West Mifflin flood?

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

21paid claims since 1980
$236Kpaid to owners
4homes flooded more than once
19802026

Biggest named events

  • Tropical Storm Ivan: 4 claims, $75K

Homes that flooded again and again

■ FEMA “severe repetitive loss” (0) ■ flooded 2+ times

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

1 federal disaster brought FEMA money here

Disasters the President declared that paid out in West Mifflin itself: aid to households, or repair grants to the Borough of West Mifflin.

Brought FEMA money into West MifflinDeclared for Allegheny County only
2004

Tropical Depression Ivan

69 households applied for aid $153K aid approved
Allegheny County has had 16 natural disasters declared since 1953, most often floods and severe storms.
Around West Mifflin

West Mifflin and the towns around it

Dravosburg: High, mostly inland floodingMunhall: Very low, mostly inland floodingDuquesne: Very low, mostly inland floodingPittsburgh: High, mostly inland floodingBaldwin: Very low, mostly inland floodingGlassport: Very high, mostly inland floodingJefferson Hills: Low, mostly inland floodingWhitaker: Very low, mostly inland floodingMcKeesport: Moderate, mostly inland floodingPleasant Hills: Very low, mostly inland floodingBraddock: Moderate, mostly inland floodingClairton: Moderate, mostly inland floodingWest Homestead: Very low, mostly inland floodingHomestead: Very low, mostly inland floodingSwissvale: Very low, mostly inland floodingNorth Versailles: Very low, mostly inland floodingPenn Hills: Very low, mostly inland floodingRoss: Very low, mostly inland floodingGreen Tree: Very low, mostly inland floodingBaldwin: Very low, mostly inland floodingReserve: High, mostly inland floodingCrafton: Very low, mostly inland floodingIngram: High, mostly inland floodingWilkinsburg: Very low, mostly inland floodingMcKees Rocks: Very high, mostly inland floodingWhitehall: Very low, mostly inland floodingBrentwood: Very low, mostly inland floodingBethel Park: Very low, mostly inland floodingSouth Park: Low, mostly inland floodingPort Vue: High, mostly inland floodingLiberty: Moderate, mostly inland floodingLincoln: Moderate, mostly inland floodingWest Elizabeth: High, mostly inland floodingForward: High, mostly inland floodingElizabeth: Very high, mostly inland floodingUnion: Low, mostly inland floodingWhite Oak: Low, mostly inland floodingVersailles: High, mostly inland floodingElizabeth: Moderate, mostly inland floodingNorth Braddock: Low, mostly inland floodingRankin: Low, mostly inland floodingWest Mifflin: Very low, mostly inland flooding West MifflinDravosburgMunhallDuquesnePittsburghBaldwinGlassportJefferson HillsWhitakerMcKeesportPleasant HillsBraddockClairton
Very lowLowModerateHighVery high
Glassportmostly inland floodingVery high
Dravosburgmostly inland floodingHigh
Pittsburghmostly inland floodingHigh
McKeesportmostly inland floodingModerate
Braddockmostly inland floodingModerate
Clairtonmostly inland floodingModerate
Jefferson Hillsmostly inland floodingLow
Duquesnemostly inland floodingVery low
Whitakermostly inland floodingVery low
Munhallmostly inland floodingVery low
West Mifflinmostly inland floodingVery low
Baldwinmostly inland floodingVery low
Pleasant Hillsmostly 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. West Mifflin covers 6 census tracts, combined by population.
Money that reached townFlood claims are matched to West Mifflin’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Borough of West Mifflin. 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 West Mifflin total about $3.4M 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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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/18 · 2025-01-01
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