Natural hazards · Delton

Delton, WI natural hazards

Most of the natural-hazard damage FEMA expects in Delton comes from inland flooding, and overall the risk is moderate for a U.S. community. 2 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Delton?

Moderate

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Delton to be higher than in 45% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding55%Cold waves17%Tornadoes14%Hail8%Everything else6%

By hazard

What Delton faces

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

Inland flooding

55% of expected damage

Above average · higher than 61% of U.S. places

Recorded about 2 times a year in the area

Cold waves

17% of expected damage

Below average · higher than 35% of U.S. places

Recorded about 6 times a year in the area

Tornadoes

14% of expected damage

Well above average · higher than 80% of U.S. places

Recorded about once every 80 years in the area

Hail

8% of expected damage

Well above average · higher than 92% 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 Delton flood?

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

of homes in flood zones
are insured

of all homes
are insured

No community discount. Delton isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Sauk County.

Disasters that hit Delton

2 federal disasters brought FEMA money here

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

Brought FEMA money into DeltonDeclared for Sauk County only

2008

Severe Storms, Tornadoes, and Flooding

$38K to the Town of Delton for repairs

2000

Severe Storms, Tornadoes, and Flooding

$14K to the Town of Delton for repairs

Sauk County has had 13 natural disasters declared since 1953, most often severe storms and floods.

Around Delton

Delton and the towns around it

Very lowLowModerateHighVery high

Newportmostly hailHigh

Dellonamostly inland floodingHigh

Excelsiormostly inland floodingHigh

Fairfieldmostly inland floodingModerate

Lyndonmostly inland floodingModerate

Deltonmostly inland floodingModerate

Lake Deltonmostly inland floodingLow

Wisconsin Dellsmostly inland floodingLow

Baraboomostly 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. Delton covers 2 census tracts, combined by population.

Money that reached townFlood claims are matched to Delton’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Delton. 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 Delton total about $2.5M 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.