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Beaverhead County, Montana

Natural disaster risk, federal disaster history and flood insurance facts.

Relatively Low overall risk
22nd of 56highest risk in Montana
$10Mexpected losses a year
4federal declarations
1 in 200homes with flood insurance
Photo: U.S. Geological Survey, public domain

Beaverhead County, Montana has a relatively low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 57% of US counties. It ranks 22nd of 56 counties in Montana. The costliest hazards here are inland flooding, earthquakes and avalanches. FEMA estimates about $9.9 million a year in expected losses, or roughly $1,056 per resident. Since 2000 it has been included in 4 federal disaster or emergency declarations for natural events (1 major disaster). The most recent was in August 2026 (Sand Creek Fire). Only 33 homes here carry federal flood insurance. Since 1978, federal flood insurance has paid about $2,464 on 12 claims here.

FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.

Top risks in Beaverhead County

$3.1 million a yearExpected losses. Damaging events about once every 6 years.
  • Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
  • Price a flood policy now. Most new federal policies take 30 days to start.
$2.2 million a yearExpected losses. Damaging events about once every 25 years.
  • Ask whether an older house is bolted to its foundation.
  • Consider separate earthquake insurance where risk is high.
$1.8 million a yearExpected losses. Damaging events about once every 8 years.
  • Check avalanche forecasts before backcountry trips.
  • Ask about slide paths near mountain homes.
HazardRatingScoreExpected loss a year
Inland floodingLow36.3
$3M
EarthquakeLow85.7
$2M
AvalancheHigh93.6
$2M
Cold waveModerate70.0
$2M
WildfireLow84.3
$480K
LightningModerate64.0
$288K
Winter weatherHigh86.1
$220K
LandslideModerate92.7
$60K
DroughtLow39.1
$44K
Strong windVery Low6.8
$33K
HailVery Low12.5
$30K
TornadoVery Low6.8
$24K
Heat waveVery Low5.0
$4K
Ice stormVery Low9.9
$4K
Volcanic activityVery Low11.7
$0

Scores are percentiles: a score of 90 means higher risk than about 90% of US counties for that hazard. Hazards FEMA does not rate here are left out. Social vulnerability is relatively high and community resilience is relatively low in FEMA's measures.

Federal disaster history

Recent disasters nationwide ›

Declarations by decade

Federal declarations for natural events that included Beaverhead County. 2020s bar runs to November 2026.

By type

Fire3
Hurricane1

Most recent

Aug 14, 2026Sand Creek FireFire management
Sep 13, 2005Hurricane Katrina EvacuationEmergency
Aug 30, 2000WildfiresMajor disaster
Aug 8, 2000Mt - Central Zone 3C Fire ComplexFire management

Montana also had 36 statewide declarations that did not name single counties.

Storm history since 1957

Tornado risk by county ›

The National Weather Service has logged 203 storm reports in Beaverhead County since 1957, with 0 deaths and 23 injuries and about $3.3 million in reported damage. The strongest on record here was an F2 tornado on May 19, 1962.

13tornadoes
54hail reports, largest 2.75 inches
105damaging thunderstorm winds
8floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
May 19, 1962F2–0 / 0
Jun 14, 1962F2–0 / 0
Jul 3, 1988F1–0 / 0
May 16, 1991F0–0 / 0
Sep 5, 1995F0Dillon0 / 0

Most damaging storms

DateTypeNearDamage
Jun 6, 1976Tornado–$3M
May 17, 1994Thunderstorm WindDillon$500K
Apr 10, 2023FloodDewey$100K
Jan 16, 2024FloodDillon Arpt$100K
May 19, 1962Tornado–$25K
May 16, 1991Tornado–$25K

Source: NOAA Storm Events Database, county-based reports through Jul 30, 2026. Tornado records start in 1950, hail and wind in 1955, and floods and other storm types in 1996, so older decades undercount. Damage is in dollars of the year it happened and is often an estimate. Winter storms, heat and hurricanes are logged by forecast zone, not county, so they are not counted here.

Flood insurance in Beaverhead County

Check your address flood zone ›
0.5%of homes have federal flood insurance (33 policies)
0%of homes in mapped high-risk flood zones are insured
$2,464paid on 12 flood claims since 1978
1982costliest year, with $1,604 paid

National Flood Insurance Program (NFIP) records only; private flood policies are not included. Home counts as of Aug 3, 2026. Since 2021 NFIP prices each home separately under Risk Rating 2.0, so your price depends on the building, not the county. Ask an agent for a quote.

Homes in Beaverhead County

$308,300median home value (Montana $375,800, US $332,700)
1979median year homes were built (Montana 1981, US 1980)
52%of homes built before 1980, before many modern wind, quake and flood building rules
17.5%of homes are mobile homes, which are the least safe in tornadoes and high winds

Older homes and mobile homes usually suffer more damage in storms, floods and earthquakes, and can cost more to insure. If you are buying, ask about roof age, foundation bolting and any retrofits. Source: US Census Bureau, American Community Survey 2020 to 2024 5-year estimates; 4,981 housing units.

Compare in Montana

All 56 ›
Largest countiesOverall riskTop hazard
Yellowstone CountyModerateInland flooding
Gallatin CountyModerateEarthquake
Missoula CountyLowInland flooding
Flathead CountyModerateInland flooding
Cascade CountyModerateInland flooding
Lewis and Clark CountyLowCold wave
Ravalli CountyLowWildfire
Silver Bow CountyVery LowCold wave

Neighboring counties

CountyOverall riskDeclarations
Ravalli CountyLow11
Silver Bow CountyVery Low5
Fremont County, IDVery Low3
Deer Lodge CountyVery Low8
Madison CountyVery Low5
Lemhi County, IDVery Low3
Clark County, IDVery Low2

Common questions about Beaverhead County

What is the biggest natural hazard in Beaverhead County?

Inland flooding has the highest expected yearly losses in Beaverhead County, about $3.1 million a year in FEMA's estimate. Earthquake is second at $2.2 million.

How many federal disasters has Beaverhead County had?

Beaverhead County has been included in 4 federal disaster or emergency declarations for natural events since 2000, including 1 major disaster. The most recent was Sand Creek Fire in August 2026.

Is Beaverhead County a high-risk place to live?

Its overall rating is Relatively Low, 22nd highest of 56 in Montana. A county rating covers the whole area. Risk at one address can be much higher or lower, so check the FEMA flood map and ask about the home's history.

Do I need flood insurance in Beaverhead County?

Standard home insurance does not cover flooding. About 1 in 200 homes in Beaverhead County has federal flood insurance. Lenders require it in mapped high-risk zones, but many flood claims come from outside those zones.

How many tornadoes has Beaverhead County had?

NOAA records list 13 tornadoes in Beaverhead County since 1950. The strongest was an F2 tornado on May 19, 1962. The weather service has also logged 54 hail reports and 8 floods here.

Sources: FEMA National Risk Index (December 2025), OpenFEMA Disaster Declarations Summaries, and NFIP policy and claims data. Hazard Compass is independent and not affiliated with FEMA. These figures describe the whole county, not a single property, and are not insurance or safety advice. Report a problem.