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Natural hazards · Sun Prairie

Sun Prairie, WI natural hazards

Most of the natural-hazard damage FEMA expects in Sun Prairie comes from inland flooding, and overall the risk is very low for a U.S. community. Flood insurance has paid 5 claims here since 1991. 4 federal disasters brought FEMA money into town.

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

How exposed is Sun Prairie?

7
Very low
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Sun Prairie to be higher than in 7% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding43%Cold waves23%Tornadoes18%Hail8%Everything else8%
By hazard

What Sun Prairie faces

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

Inland flooding

43% of expected damage
Well below average · higher than 11% of U.S. places
Recorded about 2 times a year in the area

Cold waves

23% of expected damage
Above average · higher than 55% of U.S. places
Recorded about 6 times a year in the area

Tornadoes

18% of expected damage
Well above average · higher than 76% of U.S. places
Recorded about once every 47 years in the area

Hail

8% of expected damage
Well above average · higher than 87% of U.S. places
Recorded about 4 times a year in the area

Lower here

HurricanesIce stormsWinter weatherHeat 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 Sun Prairie flood?

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

5paid claims since 1991
$23Kpaid to owners
0homes flooded more than once
19912026
of homes in flood zones
are insured
of all homes
are insured
No community discount. Sun Prairie isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Dane County.
Disasters that hit Sun Prairie

4 federal disasters brought FEMA money here

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

Brought FEMA money into Sun PrairieDeclared for Dane County only
2011

Severe Winter Storm and Snowstorm

$6K to the Town of Sun Prairie for repairs
2008

Severe Storms, Tornadoes, and Flooding

$90K to the Town of Sun Prairie for repairs
2008

Record Snow and Near Record Snow

$5K to the Town of Sun Prairie for repairs
2000

Severe Storms, Tornadoes, and Flooding

$27K to the Town of Sun Prairie for repairs
Dane County has had 17 natural disasters declared since 1953, most often severe storms and winter storms.
Around Sun Prairie

Sun Prairie and the towns around it

Sun Prairie: Very low, mostly inland floodingCottage Grove: Very low, mostly inland floodingMedina: Low, mostly inland floodingCottage Grove: Very low, mostly inland floodingBristol: Low, mostly inland floodingBurke: Very low, mostly inland floodingWindsor: Low, mostly inland floodingMadison: Very low, mostly inland floodingDeerfield: Very low, mostly inland floodingYork: Low, mostly inland floodingWaterloo: Low, mostly inland floodingWaterloo: Low, mostly inland floodingMcFarland: Low, mostly inland floodingPleasant Springs: Low, mostly inland floodingHampden: High, mostly hailDeForest: Low, mostly inland floodingSun Prairie: Very low, mostly inland flooding Sun PrairieSun PrairieCottage GroveMedinaCottage GroveBristolBurke
Very lowLowModerateHighVery high
Medinamostly inland floodingLow
Bristolmostly inland floodingLow
Cottage Grovemostly inland floodingVery low
Cottage Grovemostly inland floodingVery low
Sun Prairiemostly inland floodingVery low
Burkemostly inland floodingVery low
Sun Prairiemostly 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. Sun Prairie covers 2 census tracts, combined by population.
Money that reached townFlood claims are matched to Sun Prairie’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to the Town of Sun Prairie. 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 Sun Prairie total about $4.1M 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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