Cassia County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Cassia County: 0.
2. Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.

Storm Prediction Center severe weather database, 1950 to 2025.

Every large fire

1. Large fires mapped by the Monitoring Trends in Burn Severity program since 1984: 1,000 acres or more in the West, 500 or more in the East. Prescribed burns are excluded. Acres here are the part of each perimeter inside this place.

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service), 1984 to 2026.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

River crests

River gauges

1. Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.

NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.

1. The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.

NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.

Every earthquake of magnitude 4 or more within 50 miles

1. Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the county boundary (or inside the county).
2. Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).

USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.

Volcanoes within 100 miles

1. U.S. volcanoes within 100 miles, from the USGS Volcano Hazards Program. The threat category is the USGS 2018 National Volcanic Threat Assessment, which ranks volcanoes by how hazardous their past eruptions were and how many people and how much infrastructure lie near them. It is not a forecast of eruption.

USGS Volcano Hazards Program, retrieved October 30, 2026.

Mapped landslides

Mapped by ID GS (44), UT GRC (2).

1. Landslides mapped in the USGS compilation of landslide inventories across the United States (version 3.0, 2025), rated probable or better. The compilation joins inventories made by federal and state agencies for different purposes and areas, so the number mapped in a county reflects how closely it has been surveyed as much as how often its slopes fail. An area with few records may simply not have been mapped. Deaths are as recorded in the inventories; a slide listed in two inventories is counted once.

USGS Landslide Inventories across the United States, version 3.0, retrieved October 27, 2026.

More event types since 1996

Costliest events since 1996

1. Feb 4, 2017Flood$5.2 million
   National Weather Service narrative

   A warmup in temperatures caused extensive snow melt to lower elevations of Cassia County with devastating flooding throughout the rural county. Flooding began in earnest on the 5th. Interstate 86 was closed for a 36 mile stretch in the county with flooding over the Raft River bridges. A foot and a half of water was over the interstate and it was closed from the 6th until the 9th. The interstate began to flood on the 5th. Cassia County was declared a state disaster area. Dozens of homes were severely damaged by flood waters. Many private wells and septic systems flooded contaminating many homes. Several back roads had to be closed and many suffered tremendous damage.

2. Apr 8, 1999Blizzard, Eastern Magic Valley$230,000
   National Weather Service narrative

   A winter storm brought widespread snow to Eastern Idaho with blizzard conditions reported in the Magic Valley. Heavy snow and strong winds were reported in the Burley area with accumulation of up to 6 inches and drifts of up to 2 feet. Numerous vehicle accidents and slide offs were reported along I-84 and secondary roads. Major accidents closed I-84 for 10 hours and caused a 15 mile backup on the interstate. Dozens of injured, including two sheriff deputies, were transported to local hospitals. Other injuries included 9 university students when their bus collided with a truck. A major contributor to the accidents was the near zero visibilities reported in many locations by ISP.…

3. Apr 10, 2022Winter Storm, Raft River Region$200,000
   National Weather Service narrative

   Snow and strong winds caused whiteout conditions on interstate 84 with a multiple vehicle accident influenced by the weather occurring just south of the Yale Road Exit at around 5:30 MDT. RWIS station ITD 12 near the incident reported 0.24 mile visibility at 415 PM and wind gusts as high as 66 mph at 445 PM. Wind gusts over 50 mph through 645 PM. Nine people were transported to hospitals. AS many as 12 semi tractor trailers were involved. Interstate 86 then closed from 630 PM MDT until 115 AM MDT on the 12th.

4. Jun 22, 2005Thunderstorm Wind$200,000
   National Weather Service narrative

   A strong thunderstorm brought wind damage to much of Cassia County. Several trees were downed with at least 7 vehicles damaged by falling trees in Oakley. Sate highway 77 in Albion was blocked by a downed tree for more than an hour. In Declo, a tree crashed through the roof of a house on Main Street. Several power outages also were reported.

5. Mar 1, 2017Flood$175,000
   National Weather Service narrative

   Sheet flooding continued in March throughout Cassia although effects were not nearly as strong as February. Property and road damage continued to add up and many fields in the Oakley area remained under water for much of the month.

6. May 16, 2005Flash Flood$110,000
   National Weather Service narrative

   1 to 2 inches of rainfall in a 2 hour period created extensive flash flooding in the towns of Albion and Oakley. In Albion, Marsh and Land Creeks flooded with the city of Albion declared a disaster area. 3 county road bridges/culverts were washed out. This cut off access to 6 homes. A foot of water was flowing across state highway 77 with damage to other county roads. 8 to 11 homes in Albion reported extensive basement and/or bedroom and kitchen flooding. Birch Creek created flooding in Oakley. Water from the Birch Creek Diversion canal flooded numerous roads but caused no damage. 1 home had basement flooding.

7. Apr 11, 2012Dust Storm, Eastern Magic Valley$85,000
   National Weather Service narrative

   Post cold frontal winds combined with freshly tilled fields to cause a massive dust storm along interstate 84 in the Burley area. The reduced visibility caused one massive pileup involving 18 cars in a major accident. East bound traffic was shut down for several hours along the interstate. Two people were taken to the hospital but there were no fatalities or serious injuries reported.

8. Jul 5, 2001Thunderstorm Wind$70,000
   National Weather Service narrative

   A severe thunderstorms with measured gusts to 69 mph affected the city of Malta in Cassia County. Most of the damage occurred just northeast of the city along Sublett Road. Several small trees were downed, an attached garage was destroyed, approximately 20 power poles were downed, some trees blown across Sublett road, several residential windows and car windows blown out. the strong winds hit between 4 pm and 5 pm MDT. Damage to the electric company alone measured 40,000 dollars.

9. Jun 15, 2000High Wind, Eastern Magic Valley$60,000
   National Weather Service narrative

   Sustained high winds at 40 to 48 mph were recorded by mesonet in the Magic Valley, throughout the afternoon. A peak gust of 62 mph was recorded, which coincided with the crumpling of a grain silo near Heyburn. The destruction of this silo accounted for the majority of the monetary damages sustained during the wind event. Additionally, downed trees and damage to wheel line irrigation systems were reported in the Magic Valley. Elsewhere across the Snake River Plains, winds were strong but below high wind criteria with a few locations reported power outages from downed trees or tree limbs.

10. Mar 25, 2006Thunderstorm Wind$43,000
    National Weather Service narrative

    Several trees reported downed in Oakley.

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

All-time high

107°FJul 30, 2000

All-time low

−30°F2 times, most recently Jan 22, 1962

Warmest night

71°F2 times, most recently Aug 10, 2000

Coldest day

−8°FDec 21, 1990

Wettest day

1.75 inDec 23, 1964

Snowiest day

12.0 inJan 27, 1968

Hottest year

1994mean 51.7°F

Coldest year

1985mean 42.9°F

Wettest year

199815.77 in

Driest year

20134.69 in

Station Burley Municipal Airport (USW00024133), 4,143 ft elevation, 4.1 miles from the population centre. Daily records from 1948 to October 26, 2026; 99.5% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.

NOAA NCEI Global Historical Climatology Network Daily.

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

Neighbouring counties

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily, station USW00024133.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Volcanoes USGS Volcano Hazards Program, U.S. volcanoes and 2018 threat assessment.
• Landslides USGS Landslide Inventories across the United States, version 3.0 (2025).
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.