Natural hazards · Hanna

Hanna, WY natural hazards

Most of the natural-hazard damage FEMA expects in Hanna comes from avalanches, and overall the risk is high for a U.S. community.

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

Expected damage

How exposed is Hanna?

High

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Hanna to be higher than in 78% of U.S. communities, mostly from avalanches and inland flooding.

Avalanches53%Inland flooding31%Cold waves7%Everything else9%

By hazard

What Hanna faces

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

Avalanches

53% of expected damage

Well below average · higher than 0% of U.S. places

Recorded about once every 8 years in the area

Inland flooding

31% of expected damage

Well above average · higher than 91% of U.S. places

Recorded about once every 4 years in the area

Cold waves

7% of expected damage

Well above average · higher than 94% of U.S. places

Recorded about 4 times a year in the area

Lower here

TornadoesHailIce stormsWinter weatherWildfireEarthquakesLandslidesStrong windLightning

Not a risk here

Coastal floodingHurricanesHeat wavesDroughtTsunamisVolcanic 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 Hanna flood?

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

of all homes
are insured

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

Insurance rates: Carbon County.

Disasters that hit Hanna

Federal disasters declared here

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

Brought FEMA money into HannaDeclared for Carbon County only

Carbon County has had 3 natural disasters declared since 1953, most often fires and severe storms.

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. Hanna is smaller than a census tract, so it shares the figures of the tract around its center.

Money that reached townFlood claims are matched to Hanna’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Hanna. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

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.