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Natural hazards · Castle Rock

Castle Rock, WI natural hazards

Most of the natural-hazard damage FEMA expects in Castle Rock comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 1 claim here since 1978. 7 federal disasters brought FEMA money into town.

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

How exposed is Castle Rock?

27
Low
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Castle Rock to be higher than in 27% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding48%Cold waves17%Tornadoes12%Hail8%Strong wind6%Everything else9%
By hazard

What Castle Rock faces

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

Inland flooding

48% of expected damage
Below average · higher than 41% of U.S. places
Recorded about 3 times a year in the area

Cold waves

17% of expected damage
Below average · higher than 31% of U.S. places
Recorded about 6 times a year in the area

Tornadoes

12% of expected damage
Well above average · higher than 80% of U.S. places
Recorded about once every 11 years in the area

Hail

8% of expected damage
Well above average · higher than 85% of U.S. places
Recorded about 3 times a year in the area

Strong wind

6% of expected damage
Well above average · higher than 86% of U.S. places
Recorded about 4 times a year in the area

Lower here

HurricanesIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesLightningDrought

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 Castle Rock flood?

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

1paid claims since 1978
$428paid to owners
0homes flooded more than once
19782026
of homes in flood zones
are insured
of all homes
are insured
No community discount. Castle Rock isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Grant County.
Disasters that hit Castle Rock

7 federal disasters brought FEMA money here

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

Brought FEMA money into Castle RockDeclared for Grant County only
2017

Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mud

$53K to the Town of Castle Rock for repairs
2013

Severe Storms, Flooding, and Mudslides

$79K to the Town of Castle Rock for repairs
2011

Severe Winter Storm and Snowstorm

$3K to the Town of Castle Rock for repairs
2010

Severe Storms, Tornadoes, and Flooding

$1K to the Town of Castle Rock for repairs
2008

Severe Storms, Tornadoes, and Flooding

$50K to the Town of Castle Rock for repairs
2004

Severe Storms and Flooding

$10K to the Town of Castle Rock for repairs
2000

Severe Storms, Tornadoes, and Flooding

$24K to the Town of Castle Rock for repairs
Grant County has had 17 natural disasters declared since 1953, most often severe storms and floods.
Around Castle Rock

Castle Rock and the towns around it

Wingville: Low, mostly inland floodingHighland: High, mostly inland floodingMuscoda: Low, mostly inland floodingHickory Grove: Low, mostly inland floodingMontfort: Low, mostly inland floodingFennimore: Very low, mostly inland floodingClifton: Low, mostly inland floodingEden: Very low, mostly inland floodingPulaski: High, mostly inland floodingClyde: High, mostly inland floodingDodgeville: Very low, mostly inland floodingMuscoda: Low, mostly inland floodingEagle: High, mostly inland floodingWatterstown: High, mostly inland floodingMarion: Very low, mostly inland floodingCastle Rock: Low, mostly inland flooding Castle RockWingvilleHighlandMuscodaHickory Grove
Very lowLowModerateHighVery high
Highlandmostly inland floodingHigh
Castle Rockmostly inland floodingLow
Wingvillemostly inland floodingLow
Muscodamostly inland floodingLow
Hickory Grovemostly 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. Castle Rock covers 1 census tract, combined by population.
Money that reached townFlood claims are matched to Castle Rock’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to the Town of Castle Rock. 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 Castle Rock total about $1.6M 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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