Natural hazards · Griswold

Griswold, CT natural hazards

Most of the natural-hazard damage FEMA expects in Griswold comes from inland flooding, and overall the risk is high for a U.S. community. Flood insurance has paid 3 claims here since 1987.

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

Expected damage

How exposed is Griswold?

High

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Griswold to be higher than in 62% of U.S. communities, mostly from inland flooding and hurricanes.

Inland flooding66%Hurricanes24%Everything else10%

By hazard

What Griswold faces

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

Inland flooding

66% of expected damage

Above average · higher than 74% of U.S. places

Recorded about 2 times a year in the area

Hurricanes

24% of expected damage

Well above average · higher than 87% of U.S. places

Recorded about once every 6 years in the area

Lower here

TornadoesHailIce stormsWinter weatherCold wavesHeat wavesWildfireEarthquakesLandslidesStrong windLightningDrought

Not a risk here

Coastal floodingAvalanchesTsunamisVolcanic 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 Griswold flood?

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

3paid claims since 1987

$24Kpaid to owners

0homes flooded more than once

19872026

Biggest named events

March 2010 Nor'easter: 1 claim, $18K
December Storm - Nor'easter: 1 claim, $6K

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: .

Around Griswold

Griswold and the towns around it

Very lowLowModerateHighVery high

Jewett Citymostly inland floodingHigh

Plainfieldmostly inland floodingHigh

Griswoldmostly inland floodingHigh

Lisbonmostly inland floodingModerate

Prestonmostly inland floodingModerate

North Stoningtonmostly inland floodingModerate

Voluntownmostly 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. Griswold covers 2 census tracts, combined by population.

Money that reached townFlood claims are matched to Griswold’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Griswold. 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 Griswold 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.