Natural hazards · Johnstown

Johnstown, WI natural hazards

Most of the natural-hazard damage FEMA expects in Johnstown comes from inland flooding, and overall the risk is very low for a U.S. community.

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

Expected damage

How exposed is Johnstown?

Very low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Johnstown to be higher than in 19% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding38%Cold waves31%Tornadoes13%Strong wind7%Hail6%Everything else6%

By hazard

What Johnstown faces

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

Inland flooding

38% of expected damage

Below average · higher than 27% of U.S. places

Recorded about once every 3 years in the area

Cold waves

31% of expected damage

Well below average · higher than 19% of U.S. places

Recorded about 9 times a year in the area

Tornadoes

13% of expected damage

Above average · higher than 72% of U.S. places

Recorded about once every 38 years in the area

Strong wind

7% of expected damage

Well above average · higher than 93% of U.S. places

Recorded about 3 times a year in the area

Hail

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

Ice stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesLightningDrought

Not a risk here

Coastal floodingHurricanesAvalanchesTsunamisVolcanic 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 Johnstown flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Polk County.

Disasters that hit Johnstown

Federal disasters declared here

None of the disasters declared for Polk County shows FEMA aid or repair money reaching Johnstown itself in FEMA’s records.

Brought FEMA money into JohnstownDeclared for Polk County only

Polk County has had 8 natural disasters declared since 1953, most often floods and tornadoes.

Around Johnstown

Johnstown and the towns around it

Very lowLowModerateHighVery high

Beavermostly cold wavesLow

McKinleymostly inland floodingLow

Johnstownmostly inland floodingVery low

Georgetownmostly inland floodingVery low

Crystal Lakemostly cold wavesVery 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. Johnstown covers 1 census tract, combined by population.

Money that reached townFlood claims are matched to Johnstown’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Johnstown. 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 Johnstown total about $641K 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.