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Natural hazards · Loudon

Loudon, NH natural hazards

Most of the natural-hazard damage FEMA expects in Loudon comes from inland flooding, and overall the risk is high 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 Loudon?

71
High
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Loudon to be higher than in 71% of U.S. communities, mostly from inland flooding.

Inland flooding77%Hurricanes7%Everything else16%
By hazard

What Loudon faces

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

Inland flooding

77% of expected damage
Well above average · higher than 87% of U.S. places
Recorded about 3 times a year in the area

Hurricanes

7% of expected damage
Well above average · higher than 82% of U.S. places
Recorded about once every 10 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 Loudon flood?

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

of homes in flood zones
are insured
of all homes
are insured
No community discount. Loudon 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 Loudon

9 federal disasters brought FEMA money here

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

Brought FEMA money into LoudonDeclared for Merrimack County only
2013

Severe Winter Storm and Snowstorm

$14K to the Town of Loudon for repairs
2012

Hurricane Sandy

$3K to the Town of Loudon for repairs
2011

Tropical Storm Irene

$3K to the Town of Loudon for repairs
2010

Severe Winter Storm

$8K to the Town of Loudon for repairs
2007

Severe Storms and Flooding

7 households applied for aid $8K aid approved $20K to the Town of Loudon for repairs
2006

Severe Storms and Flooding

16 households applied for aid $18K aid approved $693K to the Town of Loudon for repairs
2005

Severe Storms and Flooding

1 household applied for aid $26K to the Town of Loudon for repairs
2005

Record And/Or Near Record Snow

$11K to the Town of Loudon for repairs
2003

Snow

$21K to the Town of Loudon for repairs
Merrimack County has had 24 natural disasters declared since 1953, most often severe storms and floods.
Around Loudon

Loudon and the towns around it

Canterbury: Moderate, mostly inland floodingChichester: Moderate, mostly inland floodingGilmanton: Moderate, mostly inland floodingConcord: Moderate, mostly inland floodingBoscawen: Moderate, mostly inland floodingNorthfield: High, mostly inland floodingPittsfield: High, mostly inland floodingEpsom: High, mostly inland floodingPembroke: High, mostly inland floodingBarnstead: High, mostly inland floodingBelmont: High, mostly inland floodingAlton: Moderate, mostly inland floodingGilford: Low, mostly inland floodingBow: Low, mostly inland floodingHopkinton: High, mostly inland floodingLoudon: High, mostly inland flooding LoudonCanterburyChichesterGilmantonConcord
Very lowLowModerateHighVery high
Loudonmostly inland floodingHigh
Gilmantonmostly inland floodingModerate
Canterburymostly inland floodingModerate
Chichestermostly inland floodingModerate
Concordmostly inland floodingModerate
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. Loudon covers 1 census tract, combined by population.
Money that reached townFlood claims are matched to Loudon’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Loudon. 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 Loudon total about $1.9M 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.

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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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