Natural hazards · Unionville

Unionville, MT natural hazards

Most of the natural-hazard damage FEMA expects in Unionville comes from cold waves, 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 Unionville?

Very low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Unionville to be higher than in 13% of U.S. communities, mostly from cold waves and earthquakes.

Cold waves30%Earthquakes23%Inland flooding19%Avalanches19%Everything else9%

By hazard

What Unionville faces

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

Cold waves

30% of expected damage

Well above average · higher than 97% of U.S. places

Recorded about 6 times a year in the area

Earthquakes

23% of expected damage

Well above average · higher than 81% of U.S. places

Inland flooding

19% of expected damage

Well below average · higher than 10% of U.S. places

Recorded about once a year in the area

Avalanches

19% of expected damage

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

Recorded about once every 30 years in the area

Lower here

TornadoesHailIce stormsWinter weatherHeat wavesWildfireLandslidesStrong windLightning

Not a risk here

Coastal floodingHurricanesDroughtTsunamisVolcanic 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 Unionville flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Lewis and Clark County.

Disasters that hit Unionville

Federal disasters declared here

None of the disasters declared for Lewis and Clark County shows FEMA aid or repair money reaching Unionville itself in FEMA’s records.

Brought FEMA money into UnionvilleDeclared for Lewis and Clark County only

Lewis and Clark County has had 14 natural disasters declared since 1953, most often fires and floods.

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. Unionville covers 1 census tract, combined by population.

Money that reached townFlood claims are matched to Unionville’s own flood-insurance community; household aid to the registrant’s city; repair grants to Unionville. 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 Unionville 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.