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 moderate for a U.S. community.

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

Expected damage

How exposed is Johnstown?

Moderate

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Johnstown to be higher than in 44% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding55%Tornadoes17%Cold waves13%Hail7%Everything else9%

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

55% of expected damage

Above average · higher than 59% of U.S. places

Recorded about 2 times a year in the area

Tornadoes

17% of expected damage

Well above average · higher than 88% of U.S. places

Recorded about once every 13 years in the area

Cold waves

13% of expected damage

Below average · higher than 30% of U.S. places

Recorded about 5 times a year in the area

Hail

7% of expected damage

Well above average · higher than 88% 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 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: Rock County.

Disasters that hit Johnstown

Federal disasters declared here

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

Brought FEMA money into JohnstownDeclared for Rock County only

Rock County has had 14 natural disasters declared since 1953, most often severe storms and floods.

Around Johnstown

Johnstown and the towns around it

Very lowLowModerateHighVery high

Harmonymostly inland floodingModerate

Johnstownmostly inland floodingModerate

Limamostly inland floodingModerate

Bradfordmostly inland floodingModerate

Richmondmostly 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. 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 $1.5M 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.