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Natural hazards · Dunbarton

Dunbarton, NH natural hazards

Most of the natural-hazard damage FEMA expects in Dunbarton comes from inland flooding, and overall the risk is low for a U.S. community. 9 federal disasters brought FEMA money into town.

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

How exposed is Dunbarton?

25
Low
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Dunbarton to be higher than in 25% of U.S. communities, mostly from inland flooding.

Inland flooding54%Hurricanes15%Tornadoes8%Everything else24%
By hazard

What Dunbarton faces

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

Inland flooding

54% of expected damage
Below average · higher than 33% of U.S. places
Recorded about 3 times a year in the area

Hurricanes

15% of expected damage
Well above average · higher than 83% of U.S. places
Recorded about once every 10 years in the area

Tornadoes

8% of expected damage
Below average · higher than 48% of U.S. places

Lower here

HailIce stormsWinter weatherCold wavesHeat wavesWildfireEarthquakesLandslidesStrong windLightning

Not a risk here

Coastal floodingDroughtAvalanchesTsunamisVolcanic 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 Dunbarton flood?

FEMA's records show no paid flood insurance claims in Dunbarton.

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

9 federal disasters brought FEMA money here

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

Brought FEMA money into DunbartonDeclared for Merrimack County only
2013

Severe Winter Storm and Snowstorm

$12K to the Town of Dunbarton for repairs
2012

Hurricane Sandy

$4K to the Town of Dunbarton for repairs
2011

Tropical Storm Irene

$3K to the Town of Dunbarton for repairs
2010

Severe Winter Storm

$10K to the Town of Dunbarton for repairs
2008

Severe Winter Storm

$28K to the Town of Dunbarton for repairs
2006

Severe Storms and Flooding

13 households applied for aid $7K aid approved $36K to the Town of Dunbarton for repairs
2005

Record And/Or Near Record Snow

$5K to the Town of Dunbarton for repairs
2003

Snow

$8K to the Town of Dunbarton for repairs
2001

Snow

$5K to the Town of Dunbarton for repairs
Merrimack County has had 24 natural disasters declared since 1953, most often severe storms and floods.
Around Dunbarton

Dunbarton and the towns around it

Bow: Low, mostly inland floodingWeare: High, mostly inland floodingGoffstown: Moderate, mostly inland floodingHopkinton: High, mostly inland floodingHooksett: Low, mostly inland floodingConcord: Moderate, mostly inland floodingPembroke: High, mostly inland floodingDeering: High, mostly inland floodingHenniker: Moderate, mostly inland floodingFrancestown: High, mostly inland floodingNew Boston: High, mostly inland floodingBedford: Low, mostly inland floodingManchester: Moderate, mostly inland floodingWarner: High, mostly inland floodingWebster: High, mostly inland floodingAllenstown: High, mostly inland floodingAuburn: Low, mostly inland floodingCandia: Low, mostly inland floodingDeerfield: Moderate, mostly inland floodingDunbarton: Low, mostly inland flooding DunbartonBowWeareGoffstownHopkintonHooksett
Very lowLowModerateHighVery high
Hopkintonmostly inland floodingHigh
Wearemostly inland floodingHigh
Goffstownmostly inland floodingModerate
Bowmostly inland floodingLow
Hooksettmostly inland floodingLow
Dunbartonmostly 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. Dunbarton covers 1 census tract, combined by population.
Money that reached townFlood claims are matched to Dunbarton’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Dunbarton. 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 Dunbarton total about $607K 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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