Natural hazards · Delavan

Delavan, WI natural hazards

Most of the natural-hazard damage FEMA expects in Delavan comes from inland flooding, and overall the risk is very low for a U.S. community. 1 federal disaster brought FEMA money into town.

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

Expected damage

How exposed is Delavan?

Very low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Delavan to be higher than in 12% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding34%Cold waves24%Tornadoes21%Hail8%Strong wind5%Everything else8%

By hazard

What Delavan faces

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

Inland flooding

34% of expected damage

Well below average · higher than 15% of U.S. places

Recorded about once a year in the area

Cold waves

24% of expected damage

Below average · higher than 31% of U.S. places

Recorded about 5 times a year in the area

Tornadoes

21% of expected damage

Well above average · higher than 75% of U.S. places

Hail

8% of expected damage

Well above average · higher than 90% of U.S. places

Recorded about 4 times a year in the area

Strong wind

5% of expected damage

Well above average · higher than 79% of U.S. places

Recorded about 5 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 Delavan flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Walworth County.

Disasters that hit Delavan

1 federal disaster brought FEMA money here

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

Brought FEMA money into DelavanDeclared for Walworth County only

2008

Severe Storms, Tornadoes, and Flooding

44 households applied for aid $53K aid approved

Walworth County has had 11 natural disasters declared since 1953, most often winter storms and severe storms.

Around Delavan

Delavan and the towns around it

Very lowLowModerateHighVery high

Darienmostly inland floodingVery low

Delavanmostly 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. Delavan covers 2 census tracts, combined by population.

Money that reached townFlood claims are matched to Delavan’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Delavan. 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 Delavan total about $2.4M 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.