Natural hazards · Mount Oliver

Mount Oliver, PA natural hazards

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

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

Expected damage

How exposed is Mount Oliver?

Very low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Mount Oliver to be higher than in 4% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding59%Cold waves22%Earthquakes6%Everything else13%

By hazard

What Mount Oliver faces

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

Inland flooding

59% of expected damage

Well below average · higher than 17% of U.S. places

Recorded about 7 times a year in the area

Cold waves

22% of expected damage

Below average · higher than 38% of U.S. places

Recorded about 3 times a year in the area

Earthquakes

6% of expected damage

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

Lower here

HurricanesTornadoesHailIce stormsWinter weatherHeat wavesWildfireLandslidesStrong 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 Mount Oliver flood?

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

of homes in flood zones
are insured

of all homes
are insured

No community discount. Mount Oliver 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 Mount Oliver

Federal disasters declared here

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

Brought FEMA money into Mount OliverDeclared for Allegheny County only

Allegheny County has had 16 natural disasters declared since 1953, most often floods and severe storms.

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. Mount Oliver covers 1 census tract, combined by population.

Money that reached townFlood claims are matched to Mount Oliver’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Borough of Mount Oliver. 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 Mount Oliver total about $398K 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.