Natural hazards · Marietta

Marietta, PA natural hazards

Most of the natural-hazard damage FEMA expects in Marietta comes from inland flooding, and overall the risk is high for a U.S. community. Flood insurance has paid 140 claims here since 1978. 2 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Marietta?

High

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Marietta to be higher than in 79% of U.S. communities, mostly from inland flooding.

Inland flooding85%Everything else15%

By hazard

What Marietta faces

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

Inland flooding

85% of expected damage

Well above average · higher than 93% of U.S. places

Recorded about 3 times a year in the area

Lower here

HurricanesTornadoesHailIce 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 Marietta flood?

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

140paid claims since 1978

$2.9Mpaid to owners

18homes flooded more than once

19782026

Biggest named events

Tropical Storm Lee: 72 claims, $2.4M
Tropical Storm Ivan: 18 claims, $229K
Hurricane Irene: 1 claim, $5K

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. Marietta isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Lancaster County.

Disasters that hit Marietta

2 federal disasters brought FEMA money here

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

Brought FEMA money into MariettaDeclared for Lancaster County only

2011

Tropical Storm Lee

168 households applied for aid $258K aid approved

2006

Severe Storms, Flooding, and Mudslides

1 household applied for aid $5K aid approved

Lancaster County has had 19 natural disasters declared since 1953, most often floods and winter storms.

Around Marietta

Marietta and the towns around it

Very lowLowModerateHighVery high

Mariettamostly inland floodingHigh

West Hempfieldmostly inland floodingLow

East Donegalmostly 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. Marietta covers 1 census tract, combined by population.

Money that reached townFlood claims are matched to Marietta’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Borough of Marietta. 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 Marietta total about $1.2M 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.