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Powell County, Montana

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

Very Low overall risk
39th of 56highest risk in Montana
$4Mexpected losses a year
15federal declarations
1 in 250homes with flood insurance
Photo: U.S. Geological Survey, public domain

Powell County, Montana has a very low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 90% of US counties. It ranks 39th of 56 counties in Montana. The costliest hazards here are inland flooding, cold waves and wildfires. FEMA estimates about $4.1 million a year in expected losses, or roughly $587 per resident. Since 1975 it has been included in 15 federal disaster or emergency declarations for natural events (10 major disasters). The most recent was in April 2026 (severe winter storm and straight-line winds). Only 19 homes here carry federal flood insurance. Since 1978, federal flood insurance has paid about $120,000 on 18 claims here.

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

Top risks in Powell County

$1.6 million a yearExpected losses. Damaging events about once every 4 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.
$1.1 million a yearExpected losses. Damaging events about 4 times a year.
  • Insulate pipes in outside walls, crawl spaces and garages.
  • Know how to shut off the main water valve.
$684,387 a yearExpected losses. Damaging events about once every 235 years.
  • Clear dry plants and debris within 5 feet of the house.
  • Get home insurance quotes early; availability varies by area.
HazardRatingScoreExpected loss a year
Inland floodingVery Low15.8
$2M
Cold waveLow57.4
$1M
WildfireLow86.4
$684K
EarthquakeVery Low59.5
$376K
Winter weatherModerate74.7
$140K
LandslideModerate91.7
$61K
LightningVery Low14.8
$42K
Strong windVery Low5.3
$31K
HailVery Low10.5
$29K
Ice stormVery Low12.9
$6K
Heat waveVery Low5.9
$6K
DroughtVery Low21.8
$5K
TornadoVery Low2.2
$3K
AvalancheVery Low64.2
$2K

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 moderate and community resilience is very low in FEMA's measures.

Federal disaster history

Recent disasters nationwide ›

Declarations by decade

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

By type

Fire5
Flood4
Severe Storm3
Straight-Line Winds2
Hurricane1

Most recent

Apr 7, 2026Severe Winter Storm and Straight-Line WindsMajor disaster
Aug 26, 2025Windy Rock FireFire management
Aug 23, 2024Straight-Line WindsMajor disaster
Oct 31, 2018FloodingMajor disaster
Sep 9, 2017Rice Ridge FireFire management
Jun 17, 2011Severe Storms and FloodingMajor disaster
Sep 13, 2005Hurricane Katrina EvacuationEmergency
Aug 20, 2003Mt-Lincoln Fire Complex - 08/14/2003Fire management
Jul 7, 2001Severe Winter StormsMajor disaster
Aug 30, 2000WildfiresMajor disaster
Show all 15
Aug 5, 2000Mt-Southwestern Zone Two Fire ComplexFire management
Feb 23, 1996Severe Storms, Flooding, and Ice JamsMajor disaster
Mar 15, 1986Heavy Rains, Landslides & FloodingMajor disaster
May 27, 1981Severe Storms & FloodingMajor disaster
Jun 28, 1975Rains, Showmelt, Storms & FloodingMajor disaster

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

Storm history since 1962

Tornado risk by county ›

The National Weather Service has logged 103 storm reports in Powell County since 1962, with 1 death and 0 injuries and about $1.1 million in reported damage. The strongest on record here was an F1 tornado on June 28, 1982.

2tornadoes
65hail reports, largest 2 inches
27damaging thunderstorm winds
5floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
Jun 28, 1982F1–0 / 0
May 17, 1962F0–0 / 0

Most damaging storms

DateTypeNearDamage
Jun 6, 1994Thunderstorm WindHelena$500K
Jun 28, 1982Tornado–$250K
Jun 19, 2018FloodDeer Lodge Arpt$70K
Jul 17, 2013HailAvon$63K
Jul 17, 2013HailAvon$53K
Jun 6, 1994Thunderstorm WindSilver City$50K

Source: NOAA Storm Events Database, county-based reports through Sep 14, 2025. 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 Powell County

Check your address flood zone ›
0.4%of homes have federal flood insurance (19 policies)
0%of homes in mapped high-risk flood zones are insured
$119,585paid on 18 flood claims since 1978
2023costliest year, with $53,021 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 Powell County

$306,500median home value (Montana $375,800, US $332,700)
1966median year homes were built (Montana 1981, US 1980)
70%of homes built before 1980, before many modern wind, quake and flood building rules
11.9%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; 3,006 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
Missoula CountyLow19
Flathead CountyModerate13
Lewis and Clark CountyLow14
Jefferson CountyVery Low9
Deer Lodge CountyVery Low8
Granite CountyVery Low6

Common questions about Powell County

What is the biggest natural hazard in Powell County?

Inland flooding has the highest expected yearly losses in Powell County, about $1.6 million a year in FEMA's estimate. Cold wave is second at $1.1 million.

How many federal disasters has Powell County had?

Powell County has been included in 15 federal disaster or emergency declarations for natural events since 1975, including 10 major disasters. The most recent was Severe Winter Storm and Straight-Line Winds in April 2026.

Is Powell County a high-risk place to live?

Its overall rating is Very Low, 39th 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 Powell County?

Standard home insurance does not cover flooding. About 1 in 250 homes in Powell 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 Powell County had?

NOAA records list 2 tornadoes in Powell County since 1950. The strongest was an F1 tornado on June 28, 1982. The weather service has also logged 65 hail reports and 5 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.