Natural hazards · Greycliff

Greycliff, MT natural hazards

Most of the natural-hazard damage FEMA expects in Greycliff comes from inland flooding, and overall the risk is very high 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 Greycliff?

Very high

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Greycliff to be higher than in 81% of U.S. communities, mostly from inland flooding and wildfires.

Inland flooding58%Wildfire25%Cold waves10%Everything else8%

By hazard

What Greycliff faces

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

Inland flooding

58% of expected damage

Well above average · higher than 86% of U.S. places

Recorded about once every 3 years in the area

Wildfire

25% of expected damage

Well above average · higher than 98% of U.S. places

Cold waves

10% of expected damage

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

Recorded about 2 times a year in the area

Lower here

TornadoesHailIce stormsWinter weatherHeat wavesEarthquakesLandslidesStrong windLightningDroughtAvalanches

Not a risk here

Coastal floodingHurricanesTsunamisVolcanic 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 Greycliff flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Sweet Grass County.

Disasters that hit Greycliff

1 federal disaster brought FEMA money here

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

Brought FEMA money into GreycliffDeclared for Sweet Grass County only

2011

Severe Storms and Flooding

5 households applied for aid $2K aid approved

Sweet Grass County has had 8 natural disasters declared since 1953, most often severe storms and fires.

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. Greycliff 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 Greycliff’s own flood-insurance community; household aid to the registrant’s city; repair grants to Greycliff. 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.