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Risk: Relatively Low

Box Elder County, UT Environment & Hazard Risk

Relatively Low natural hazard risk, led by wildfire. 393 storm events since 1996.

Expected yearly loss
$31.3M
Relatively Low nationally
Storm events since 1996
393
Most often thunderstorm wind
Flood insurance policies
38
0.2% of homes
Hurricanes nearby
0
Since 1851

Natural hazard risk

FEMA National Risk Index, December 2025

Overall risk

Relatively Low

Score 55.9 of 100

Social vulnerability

Very Low

Score 10.6 of 100

Community resilience

Very High

Score 93.1 of 100

Community resilience runs the other way: a higher rating means a community can recover faster.

Building value exposed: $11.2B · Agriculture value exposed: $173M · Risk-adjusted yearly loss: $19.5M

Risk by hazard

  • WildfireRelatively Moderate$6.5M/yr expected annual loss, about once every 65 years
  • EarthquakeRelatively Moderate$15.7M/yr expected annual loss, about once every 72 years
  • AvalancheRelatively Moderate$1.1M/yr expected annual loss, about once every 3 years
  • Winter weatherRelatively Moderate$251K/yr expected annual loss, about 12 events a year
  • Strong windRelatively Moderate$1.5M/yr expected annual loss, about once every 1 year
  • LightningRelatively Moderate$595K/yr expected annual loss, about 31 events a year
  • DroughtRelatively Low$493K/yr expected annual loss, about 113 events a year
  • LandslideVery Low$1,897/yr expected annual loss, about 3.1 events a year
  • Heat waveRelatively Low$458K/yr expected annual loss, about 2.7 events a year
  • Cold waveVery Low$434K/yr expected annual loss, about once every 12 years
  • Ice stormVery Low$14K/yr expected annual loss, about once every 67 years
  • TornadoVery Low$170K/yr expected annual loss, about once every 3 years
  • Volcanic activityVery Low$0/yr expected annual loss, about once every 10,000 years
  • HailVery Low$37.8K/yr expected annual loss, about once every 5 years

Bars show the national percentile score (0 to 100) for each hazard. Dollar figures are expected annual losses to buildings, people and crops. Not rated here: coastal flooding, hurricane, riverine flooding, tsunami.

Flood risk and insurance

National Flood Insurance Program and FEMA flood maps

Check the flood zone for an address

Homes with flood insurance
38 of 17,688 (0.2%)
Homes in high-risk flood zones
94
Insured in high-risk zones
26 (28%)
Flood claims since 1978
18
Claims paid since 1978
$292K

Flood claims paid per year

Flood claims paid per year in Box Elder County
Beta

Storm history

Since 1996: 393 events, 9 deaths, $9.2M in damage

  • Thunderstorm Wind237
  • Heavy Snow47
  • High Wind38
  • Hail21
  • Winter Storm9
  • Winter Weather8 · 1 death
  • Strong Wind7 · 4 deaths
  • Avalanche4 · 2 deaths
  • Flood4
  • Funnel Cloud4
Beta

Events per year

Storm events per year in Box Elder County
10
2
6
10
5
2
9
6
13
15
4
4
4
12
25
36
80
46
38
35
Beta

10 tornadoes on record (EF0 3, F0 4).

Most damaging storms

Since 1996, ranked by deaths, injuries and damage

  • Lightning08/18/2024

    Corinne, Box Elder County

    1 death, 2 injured

    What happened

    A lightning strike capsized a fishing boat with three passengers on board, throwing the passengers into the river, leading to one fatality and two injuries. First responders were called just after midnight local time.

  • Winter Weather11/28/2024

    Eastern Box Elder County

    1 death, 1 injured, $50K damage

    What happened

    At approximately 10:02 pm, a Toyota Prius travelling southbound on I-15 lost control and hit a concrete barrier near milepost 354, eventually coming to rest facing sideways on the interstates shoulder. A male passenger exited the car, while the female passenger remained and opened her door. A second vehicle, a Ford Expedition, hit the male outside of the car and then crashed into the passenger side of the Prius head-on, killing the female passenger. The male passenger outside of the car was transported to the hospital in critical condition. The 2 left lanes of southbound I-15 were closed for an undisclosed amount of time for accident investigation, with Utah Highway Patrol ultimately believing weather to be the primary factor. During the time around the accident, lake enhanced snow showers were moving through the area, with a nearby DOT sensor reporting moderate to heavy snowfall, slushy road conditions, pavement temperatures dropping below freezing, and snowfall rates of a half inch per hour.

  • Strong Wind39 kt wind06/11/2025

    Eastern Box Elder County

    1 death, 1 injured

    What happened

    Perry Police Department was called to Perry Park just before 5 PM Wednesday, June 11 for reports of traumatic injuries due to a large tree branch falling on two individuals. One individual, an 80-year old woman, died on the scene. The other individual, a 28-year old woman, was transported to the hospital in serious condition. There were no thunderstorms in the vicinity of Perry during this time, but strong thunderstorms capable of producing strong outflow winds were ongoing over southeast Idaho. Outflow winds from those distant thunderstorms produced wind gusts in the 30-40 mph range, but it is unknown if the strong winds were the direct cause of the tree branch falling.

  • Dense Fog12/16/2022

    Eastern Box Elder County

    1 death, $15K damage

    What happened

    Deputies responded to a report of a car upside down around 3:15 p.m. in the Bear River at Corinne, UT. Observations from nearby Brigham City show reduced visibilities due to fog that morning from approximately 3 a.m. to 8 a.m. The visibility fell to less than 1/4 mile around 5:30 a.m.

  • Strong Wind35 kt wind08/04/2024

    Eastern Box Elder County

    1 death

    What happened

    A 51-year-old male was reportedly swept away by winds and waves during a storm. The call to rescuers came in at 8:51 p.m. Weather observations in the area showed wind gusts on the east side of Willard Bay picking up to 42 mph by 8:40 p.m. and 45 mph by 8:50 p.m. Another weather station south of Willard Bay showed wind gusts picking up to between 40-44 mph between 8:15 p.m. and 9:15 p.m. The winds were outflow winds associated with a decaying area of showers and thunderstorms.

  • Strong Wind35 kt wind08/02/2025

    Eastern Box Elder County

    1 death

    What happened

    Two individuals went out on the water at Willard Bay State Park on an inflatable raft during the afternoon of Saturday, August 2. Outflow winds from thunderstorms near the Utah-Idaho border pushed through Willard Bay area around 4:20 p.m. with wind gusts at nearby weather stations reported to be as high as 25-30 mph with the initial pass of the boundary. Winds remained elevated out of the northwest, with gusts upwards of 25-35 mph around 1.5 hours following the outflow boundary. The two individuals on the raft were reported to have been thrown off the raft when the boundary came through. One person resurfaced while the other did not.

Drinking water

35 community water systems serve about 58,639 people. Violations since 2021.

2 systems had health-based violations, such as a contaminant over the legal limit or a missed treatment step. 6 systems had a violation of any kind still open at last report.

  • Brigham City Water SystemServes 20,540 · Groundwater · Local governmentNo health violations+4 monitoring or reporting
  • Tremonton CityServes 13,000 · Groundwater · Local governmentNo health violations+50 monitoring or reporting
  • Perry CityServes 6,570 · Groundwater · Local governmentNo health violations
  • Willard City Water SystemServes 2,036 · Groundwater · Local governmentNo health violations+3 monitoring or reporting
  • West Corinne Water CoServes 1,970 · Groundwater · PrivateNo health violations
  • Honeyville Town Water SystemServes 1,750 · Groundwater · Local governmentNo health violations+3 monitoring or reporting
  • South WillardServes 1,500 · Groundwater · PrivateNo health violations+1 monitoring or reporting
  • Ukon Water CompanyServes 1,465 · Groundwater · PrivateNo health violations+3 monitoring or reporting

Largest systems by population served. Monitoring and reporting violations mean required tests or notices were late or missing, not that the water was unsafe.

Pollution sites

0 Superfund sites and 14 toxic release facilities in Box Elder County

Superfund sites

None in this county.

Toxic release facilities

Total: 950,651 lbs in 2024, 101,739 lbs to air.

Superfund sitesToxic release facilitiesEPA inspections and enforcementAir toxics cancer risk33 historic places

Frequently asked questions

How risky is Box Elder County for natural disasters?
FEMA rates Box Elder County relatively low for overall natural hazard risk, with expected losses of $31.3M a year. The highest-rated hazards are wildfire (relatively moderate), earthquake (relatively moderate), avalanche (relatively moderate).
What storms are most common in Box Elder County?
Since 1996, NOAA recorded 393 storm events affecting Box Elder County, most often thunderstorm wind (237), heavy snow (47), high wind (38).
How many tornadoes have hit Box Elder County?
10 tornadoes have been recorded in Box Elder County since 1950.
How many homes in Box Elder County have flood insurance?
38 residential flood insurance policies are in force in Box Elder County, covering about 0.2% of homes. The program has paid $292K on 18 claims here since 1978.
What is the weather like in Box Elder County?
At Brigham City 28 Wnw, average highs reach 90°F in Jul and lows fall to 15°F in Jan, with 13.8 inches of rain a year (1991-2020 normals).

Source: FEMA (National Risk Index, NFIP), NOAA (Storm Events, HURDAT2, Climate Normals), EPA · Last updated 08/01/2026 · Storm counts include events in forecast zones that touch the county. This product uses the FEMA OpenFEMA API, but is not endorsed by FEMA.

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