Natural hazards · Harrison

Harrison, NY natural hazards

Most of the natural-hazard damage FEMA expects in Harrison comes from inland flooding, and overall the risk is very low for a U.S. community. Flood insurance has paid 777 claims here since 1978. 4 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Harrison?

Very low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Harrison to be higher than in 15% of U.S. communities, mostly from inland flooding.

Inland flooding74%Hurricanes8%Earthquakes6%Everything else13%

By hazard

What Harrison faces

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

Inland flooding

74% of expected damage

Below average · higher than 31% of U.S. places

Recorded about 4 times a year in the area

Hurricanes

8% of expected damage

Above average · higher than 72% of U.S. places

Recorded about once every 7 years in the area

Earthquakes

6% of expected damage

Above average · higher than 60% of U.S. places

Lower here

Coastal floodingTornadoesHailIce stormsWinter weatherCold wavesHeat wavesWildfireLandslidesStrong windLightning

Not a risk here

DroughtAvalanchesTsunamisVolcanic 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 Harrison flood?

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

777paid claims since 1978

$12.8Mpaid to owners

0homes flooded more than once

19782026

Biggest named events

Not a named storm: 211 claims, $657K
Hurricane Ida: 151 claims, $7.6M
April 2007 Nor'easter: 80 claims, $1.5M

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Westchester County.

Disasters that hit Harrison

4 federal disasters brought FEMA money here

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

Brought FEMA money into HarrisonDeclared for Westchester County only

2021

Remnants of Hurricane Ida

495 households applied for aid $1.8M aid approved

2012

Hurricane Sandy

49 households applied for aid $11K aid approved

2011

Hurricane Irene

35 households applied for aid $89K aid approved

2007

Severe Storms and Inland and Coastal Flooding

186 households applied for aid $415K aid approved $41K to the Village of Harrison for repairs

Westchester County has had 24 natural disasters declared since 1953, most often hurricanes and floods.

Around Harrison

Harrison and the towns around it

Very lowLowModerateHighVery high

Ryemostly inland floodingModerate

Mamaroneckmostly inland floodingModerate

Ryemostly inland floodingModerate

Mamaroneckmostly inland floodingModerate

Rye Brookmostly inland floodingLow

Harrisonmostly inland floodingVery low

North Castlemostly inland floodingVery low

Scarsdalemostly inland floodingVery low

White Plainsmostly 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. Harrison covers 7 census tracts, combined by population.

Money that reached townFlood claims are matched to Harrison’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to the Village of Harrison. 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 Harrison total about $7.2M 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.