Sevier County, UT Environment & Hazard Risk
Very Low natural hazard risk, led by earthquake. 116 storm events since 1996.
- Expected yearly loss
- $10.07M
- Very Low nationally
- Storm events since 1996
- 116
- Most often thunderstorm wind
- Flood insurance policies
- 76
- 1.0% of homes
- Hurricanes nearby
- 0
- Since 1851
Natural hazard risk
FEMA National Risk Index, December 2025
Overall risk
Very Low
Score 22.7 of 100
Social vulnerability
Very Low
Score 13.8 of 100
Community resilience
Relatively Moderate
Score 56.1 of 100
Community resilience runs the other way: a higher rating means a community can recover faster.
Building value exposed: $4.74B · Agriculture value exposed: $114M · Risk-adjusted yearly loss: $8.27M
Risk by hazard
- EarthquakeRelatively Low$4.24M/yr expected annual loss, about once every 62 years
- AvalancheRelatively Moderate$691K/yr expected annual loss, about once every 6 years
- LandslideRelatively Low$19.53K/yr expected annual loss, about 2.5 events a year
- WildfireRelatively Low$452K/yr expected annual loss, about once every 465 years
- LightningRelatively Moderate$657K/yr expected annual loss, about 45 events a year
- Winter weatherRelatively Moderate$164K/yr expected annual loss, about 30 events a year
- DroughtRelatively Low$229K/yr expected annual loss, about 84 events a year
- Volcanic activityVery Low$10/yr expected annual loss, about once every 5,000 years
- Heat waveVery Low$152K/yr expected annual loss, about once every 3 years
- Ice stormVery Low$5,739/yr expected annual loss, about once every 67 years
- Strong windVery Low$66.41K/yr expected annual loss, about once every 9 years
- TornadoVery Low$27.72K/yr expected annual loss, about once every 25 years
- Cold waveVery Low$0/yr expected annual loss, about once every 2,604 years
- HailVery Low$2,031/yr expected annual loss, about once every 13 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
- 76 of 7,944 (1.0%)
- Homes in high-risk flood zones
- 274
- Insured in high-risk zones
- 63 (23%)
- Flood claims since 1978
- 15
- Claims paid since 1978
- $35.5K
Flood claims paid per year
Storm history
Since 1996: 116 events, 1 death, $1.47M in damage
- Thunderstorm Wind31
- Heavy Snow30
- High Wind18
- Flash Flood17
- Winter Storm4
- Winter Weather3
- Wildfire3 · 1 death
- Excessive Heat3
- Flood2
- Lightning2
Events per year
2 tornadoes on record (F1 1).
Most damaging storms
Since 1996, ranked by deaths, injuries and damage
- Wildfire07/15/1997
Monroe, Sevier County
1 death, $60K damage
What happened
Lightning started a wildfire (the Flat Fire) on Poverty Flat about 3 miles south of Monroe late in the afternoon on the 15th. The fire spread rapidly across 6000 acres that evening in very dry sage and pinyon/juniper due to strong thunderstorm winds. A young man was killed when trying to outrun the fire on Poverty Flat. A Type 1 Incident Team (Birch) had the fire controlled about 4 days later.
- Flash Flood07/14/2018
Richfield, Sevier County
$1M damage
What happened
Heavy rain caused flash flooding that damaged fields and homes in Richfield, including 260 acres of a 320 acre property used for farming and growing sod.
- Lightning07/06/2008
Richfield, Sevier County
1 injured
What happened
A woman was injured at the Cove View Golf Course in Richfield when lightning hit a nearby tree and traveled to her. The woman was conscious and breathing when she was taken to a nearby hospital.
- Lightning06/21/2005
Salina, Sevier County
1 injured
What happened
Construction Worker hit by lightning. Extent of injuries unknown.
- Flood06/01/2011
Monroe, Sevier County
$150K damage
- Flood05/24/2011
Salina Gunnison Arpt, Sevier County
$100K damage
Latest storm reports
Newest first
- Thunderstorm Wind56 kt wind07/28/2026
Vermillion, Sevier County
- Flash Flood07/28/2026
Monroe, Sevier County
$5,000 damage
- Wildfire07/27/2026
Central Mountains
- Flash Flood07/21/2026
Sigurd, Sevier County
$500 damage
- Flash Flood07/21/2026
Sigurd, Sevier County
$1,000 damage
- Wildfire07/01/2026
Central Mountains
- Flash Flood06/25/2026
Monroe, Sevier County
- Flash Flood06/25/2026
Monroe, Sevier County
Drinking water
16 community water systems serve about 20,347 people. Violations since 2021.
1 system had health-based violations, such as a contaminant over the legal limit or a missed treatment step. 2 systems had a violation of any kind still open at last report.
- Richfield CityServes 8,360 · Groundwater · Local governmentNo health violations
- Monroe CityServes 2,715 · Groundwater (surface influenced) · Local governmentNo health violations+1 monitoring or reporting
- Salina City Water SystemServes 2,692 · Groundwater · Local governmentNo health violations+2 monitoring or reporting
- Elsinore Town Water SystemServes 1,105 · Groundwater · Local governmentNo health violations
- Aurora CityServes 1,013 · Groundwater · Local governmentNo health violations+2 monitoring or reporting
- Annabella Town Water SystemServes 860 · Groundwater · Local governmentNo health violations
- Redmond Town Water SystemServes 830 · Groundwater · Local governmentNo health violations+2 monitoring or reporting
- Central Valley TownServes 690 · Groundwater · Local governmentNo health violations+5 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.
Climate
1991-2020 normals at Richfield Radio Ksvc, 17 mi from the county center
Summer highs peak around 90°F in Jul and winter lows bottom out near 16°F in Dec. About 7.8 inches of rain falls in a typical year, with 17.8 inches of snow.
| Month | High | Low | Rain | Snow |
|---|---|---|---|---|
| Jan | 41°F | 17°F | 0.55 in | 4.3 in |
| Feb | 47°F | 22°F | 0.45 in | 3.4 in |
| Mar | 58°F | 27°F | 0.69 in | 2.0 in |
| Apr | 64°F | 32°F | 0.59 in | 0.6 in |
| May | 73°F | 39°F | 0.97 in | 0.1 in |
| Jun | 85°F | 47°F | 0.43 in | - |
| Jul | 90°F | 54°F | 0.65 in | - |
| Aug | 88°F | 52°F | 0.71 in | - |
| Sep | 81°F | 43°F | 0.79 in | - |
| Oct | 68°F | 32°F | 0.88 in | 0.3 in |
| Nov | 53°F | 23°F | 0.48 in | 2.4 in |
| Dec | 41°F | 16°F | 0.61 in | 4.7 in |
| Year | 50°F average | 7.80 in | 17.8 in | |
Pollution sites
0 Superfund sites and 1 toxic release facility in Sevier County
Superfund sites
None in this county.
Toxic release facilities
- US Gypsum Co Sigurd Utah32.5 lbs released, Sigurd
Total: 32.5 lbs in 2024, under 1 lb to air.
Superfund sitesToxic release facilitiesEPA inspections and enforcementAir toxics cancer risk19 historic places
Frequently asked questions
- How risky is Sevier County for natural disasters?
- FEMA rates Sevier County very low for overall natural hazard risk, with expected losses of $10.07M a year. The highest-rated hazards are earthquake (relatively low), avalanche (relatively moderate), landslide (relatively low).
- What storms are most common in Sevier County?
- Since 1996, NOAA recorded 116 storm events affecting Sevier County, most often thunderstorm wind (31), heavy snow (30), high wind (18).
- How many tornadoes have hit Sevier County?
- 2 tornadoes have been recorded in Sevier County since 1950.
- How many homes in Sevier County have flood insurance?
- 76 residential flood insurance policies are in force in Sevier County, covering about 1.0% of homes. The program has paid $35.5K on 15 claims here since 1978.
- What is the weather like in Sevier County?
- At Richfield Radio Ksvc, average highs reach 90°F in Jul and lows fall to 16°F in Dec, with 7.8 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.