Natural hazards · Sewell

Sewell, NJ natural hazards

Most of the natural-hazard damage FEMA expects in Sewell comes from inland flooding, and overall the risk is very low for a U.S. community. Flood insurance has paid 3 claims here since 2010.

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

Expected damage

How exposed is Sewell?

Very low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Sewell to be higher than in 16% of U.S. communities, mostly from inland flooding.

Inland flooding56%Heat waves8%Strong wind7%Earthquakes7%Cold waves6%Everything else16%

By hazard

What Sewell faces

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

Inland flooding

56% of expected damage

Below average · higher than 27% of U.S. places

Recorded about 3 times a year in the area

Heat waves

8% of expected damage

Well below average · higher than 6% of U.S. places

Recorded about 11 times a year in the area

Strong wind

7% of expected damage

Well above average · higher than 90% of U.S. places

Recorded about 6 times a year in the area

Earthquakes

7% of expected damage

Above average · higher than 64% of U.S. places

Cold waves

6% of expected damage

Below average · higher than 40% of U.S. places

Recorded about once a year in the area

Lower here

Coastal floodingHurricanesTornadoesHailIce stormsWinter weatherWildfireLandslidesLightningDrought

Not a risk here

AvalanchesTsunamisVolcanic 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 Sewell flood?

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

3paid claims since 2010

$41Kpaid to owners

0homes flooded more than once

20102026

Biggest named events

March 2010 Nor'easter: 1 claim, $3K
Hurricane Irene: 1 claim, $23K

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Gloucester County.

Disasters that hit Sewell

Federal disasters declared here

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

Brought FEMA money into SewellDeclared for Gloucester County only

Gloucester County has had 22 natural disasters declared since 1953, most often hurricanes and severe storms.

Around Sewell

Sewell and the towns around it

Very lowLowModerateHighVery high

Sewellmostly inland floodingVery low

Wenonahmostly inland floodingVery low

Mantuamostly inland floodingVery low

Deptfordmostly inland floodingVery low

Washingtonmostly 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. Sewell covers 1 census tract, combined by population.

Money that reached townFlood claims are matched to Sewell’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to Sewell. 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 Sewell total about $1.3M 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.