Natural hazards · Derry

Derry, PA natural hazards

Most of the natural-hazard damage FEMA expects in Derry comes from inland flooding, and overall the risk is moderate for a U.S. community. Flood insurance has paid 3 claims here since 2021.

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

Expected damage

How exposed is Derry?

Moderate

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Derry to be higher than in 59% of U.S. communities, mostly from inland flooding.

Inland flooding82%Everything else18%

By hazard

What Derry faces

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

Inland flooding

82% of expected damage

Well above average · higher than 81% of U.S. places

Recorded about once every 2 years in the area

Lower here

HurricanesTornadoesHailIce stormsWinter weatherCold wavesHeat wavesWildfireEarthquakesLandslidesStrong windLightningAvalanches

Not a risk here

Coastal floodingDroughtTsunamisVolcanic 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 Derry flood?

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

3paid claims since 2021

$33Kpaid to owners

0homes flooded more than once

20212026

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Mifflin County.

Disasters that hit Derry

Federal disasters declared here

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

Brought FEMA money into DerryDeclared for Mifflin County only

Mifflin County has had 14 natural disasters declared since 1953, most often floods and hurricanes.

Around Derry

Derry and the towns around it

Very lowLowModerateHighVery high

Lewistownmostly inland floodingHigh

Milfordmostly inland floodingHigh

Fermanaghmostly inland floodingHigh

Armaghmostly inland floodingHigh

Derrymostly inland floodingModerate

Brownmostly inland floodingModerate

Decaturmostly inland floodingModerate

Granvillemostly inland floodingModerate

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. Derry covers 2 census tracts, combined by population.

Money that reached townFlood claims are matched to Derry’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to the Township of Derry. 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 Derry total about $2.9M 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.