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Natural hazards · Londonderry

Londonderry, NH natural hazards

Most of the natural-hazard damage FEMA expects in Londonderry comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 30 claims here since 1979. 15 federal disasters brought FEMA money into town.

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

How exposed is Londonderry?

35
Low
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Londonderry to be higher than in 35% of U.S. communities, mostly from inland flooding.

Inland flooding68%Tornadoes7%Hurricanes6%Earthquakes6%Everything else13%
By hazard

What Londonderry faces

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

Inland flooding

68% of expected damage
Above average · higher than 57% of U.S. places
Recorded about once a year in the area

Tornadoes

7% of expected damage
Well below average · higher than 24% of U.S. places

Hurricanes

6% of expected damage
Above average · higher than 71% of U.S. places
Recorded about once every 8 years in the area

Earthquakes

6% of expected damage
Above average · higher than 64% of U.S. places

Lower here

HailIce stormsWinter weatherCold wavesHeat wavesWildfireLandslidesStrong 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 Londonderry flood?

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

30paid claims since 1979
$419Kpaid to owners
4homes flooded more than once
19792026

Biggest named events

  • March 2010 Nor'easter: 1 claim, $4K

Homes that flooded again and again

■ FEMA “severe repetitive loss” (2) ■ flooded 2+ times

of homes in flood zones
are insured
of all homes
are insured
No community discount. Londonderry isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Rockingham County.

What’s been done with FEMA grants

4homes raised above flood level
Disasters that hit Londonderry

15 federal disasters brought FEMA money here

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

Brought FEMA money into LondonderryDeclared for Rockingham County only
2018

Severe Winter Storm and Snowstorm

$75K to the Town of Londonderry for repairs
2015

Severe Winter Storm and Snowstorm

$48K to the Town of Londonderry for repairs
2013

Severe Winter Storm and Snowstorm

$56K to the Town of Londonderry for repairs
2012

Hurricane Sandy

$38K to the Town of Londonderry for repairs
2011

Severe Storm and Snowstorm

$116K to the Town of Londonderry for repairs
2011

Hurricane Irene

$16K to the Town of Londonderry for repairs
2010

Severe Storms and Flooding

$14K to the Town of Londonderry for repairs
2010

Severe Winter Storm

$69K to the Town of Londonderry for repairs
2008

Severe Winter Storm

$339K to the Town of Londonderry for repairs
2007

Severe Storms and Flooding

37 households applied for aid $39K aid approved $10K to the Town of Londonderry for repairs
2006

Severe Storms and Flooding

253 households applied for aid $460K aid approved $509K to the Town of Londonderry for repairs
2005

Record Snow

$24K to the Town of Londonderry for repairs
2005

Record And/Or Near Record Snow

$30K to the Town of Londonderry for repairs
2003

Snow

$25K to the Town of Londonderry for repairs
2001

Snow

$29K to the Town of Londonderry for repairs
Rockingham County has had 30 natural disasters declared since 1953, most often severe storms and floods.
Around Londonderry

Londonderry and the towns around it

Windham: Low, mostly inland floodingManchester: Moderate, mostly inland floodingDerry: Moderate, mostly inland floodingHudson: Moderate, mostly inland floodingPelham: High, mostly inland floodingSalem: Moderate, mostly inland floodingBedford: Low, mostly inland floodingHooksett: Low, mostly inland floodingAuburn: Low, mostly inland floodingGoffstown: Moderate, mostly inland floodingMerrimack: Moderate, mostly inland floodingLitchfield: Moderate, mostly inland floodingSandown: Low, mostly inland floodingAtkinson: Low, mostly inland floodingHampstead: Very low, mostly inland floodingChester: Moderate, mostly inland floodingNashua: Moderate, mostly inland floodingLondonderry: Low, mostly inland flooding LondonderryWindhamManchesterDerryHudson
Very lowLowModerateHighVery high
Manchestermostly inland floodingModerate
Hudsonmostly inland floodingModerate
Derrymostly inland floodingModerate
Londonderrymostly inland floodingLow
Windhammostly 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. Londonderry covers 7 census tracts, combined by population.
Money that reached townFlood claims are matched to Londonderry’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Londonderry. 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 Londonderry total about $6.2M 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.

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/15 · 2025-01-01
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