Oregon County, MO Environment & Hazard Risk

• EarthquakeRelatively Low$1.5M/yr expected annual loss, about once every 151 years
• Cold waveRelatively Moderate$2.5M/yr expected annual loss, about 1.9 events a year
• Ice stormRelatively Moderate$239K/yr expected annual loss, about 1.2 events a year
• Heat waveRelatively Low$611K/yr expected annual loss, about 12 events a year
• LandslideRelatively Low$2,883/yr expected annual loss, about 1.8 events a year
• TornadoRelatively Low$1.3M/yr expected annual loss, about once every 2 years
• WildfireVery Low$58.7K/yr expected annual loss, about once every 487 years
• Winter weatherRelatively Low$50K/yr expected annual loss, about 9.6 events a year
• HurricaneVery Low$17.2K/yr expected annual loss, about once every 46 years
• Strong windRelatively Low$260K/yr expected annual loss, about 2.4 events a year
• LightningRelatively Low$96.1K/yr expected annual loss, about 57 events a year
• HailVery Low$28.8K/yr expected annual loss, about 3.8 events a year

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: avalanche, coastal flooding, drought, riverine flooding, tsunami, volcanic activity.

Check the flood zone for an address

Homes with flood insurance

6 of 7,803 (0.1%)

Homes in high-risk flood zones

198

Insured in high-risk zones

6 (3%)

Flood claims since 1978

39

Claims paid since 1978

$490K

• Hail102
• Thunderstorm Wind99
• Flash Flood57
• Flood34
• Winter Storm29
• Drought22
• Tornado11
• Winter Weather9
• Heat9
• Heavy Rain9

• Flash Flood04/29/2017

  Alton, Oregon County

  $4M damage

  What happened

  Numerous county roads and bridges were damaged by flash floods. Several campgrounds and river access areas were severely damaged across the county. This report will contain the total dollar estimate for flood damage to infrastructure, businesses, and homes across Oregon County. $3M in damages were reported to roads alone in the county.

• Frost/Freeze04/08/2007

  Oregon

  $3.3M damage

  What happened

  Unusually warm conditions during the month of March caused early season growth in vegetation across the Missouri Ozarks. Hay along with the wheat crop had began to mature. During the nights of April 7th through the 9th, temperatures dropped into the upper teens to mid 20s, causing a hard freeze on matured vegetation. The wheat crop suffered approximately 90% damage. Hay crops along with fescue seed also sustained major damage. Total crop losses for 34 counties across the southwestern quadrant of Missouri were estimated at $147,905,541.

• Drought08/01/2012

  Oregon

  $2M damage

  What happened

  The U.S Drought Monitor continued to report Extreme Drought (D3) to Exceptional Drought (D4) throughout the month of August. The region started seeing some rainfall by the end of the month. The COOP station near Alton reported 2.78 of rainfall for the month of August. This is a continuation of the drought that began across the region in June. Across the Missouri Ozarks and southwestern Missouri between 50 and 75 percent of the combined corn, soybeans and hay acreage was reported as a loss due to the drought. Monetary crop loss figures are estimates using information from the National Agricultural Statistics database, local FSA and USDA offices and other local, state or federal agency information. Livestock losses, if they occurred or were reported are listed in the property section.

• TornadoF2, 9 mi path, 300 yd wide11/06/2005

  Thayer, Oregon County

  $1.5M damage

  What happened

  A National Weather Service storm survey team revealed that an F-2 tornado touched down 9 miles east of Thayer near Highway V. The tornado continued on a path 300 yards wide to 8 miles northeast of Myrtle. Two mobile homes were destroyed and several other homes were heavily damaged along the tornado path.

• TornadoEF0, 4.15 mi path, 400 yd wide05/26/2024

  Calm, Oregon County

  1 injured, $200K damage

  What happened

  A NWS storm survey concluded that an EF-1 tornado occurred in far southeast Oregon County to the east of Myrtle. Two homes suffered siding damage, five barns/outbuildings were destroyed, along with numerous trees suffering damage that ranged from limb damage to being uprooted along County Road 288 before the tornado crossed the Eleven Point River near the Myrtle Access and crossed into Ripley County north of County Road 286. One injury was reported. Damage cost estimates only include the Oregon County portion of the tornado track.

• Thunderstorm Wind70 kt wind05/08/2009

  Rover, Oregon County

  $1M damage

  What happened

  Sixty to 80 mph wind gusts impacted all of Oregon County. Significant tree damage was observed countywide, while numerous outbuildings and homes sustained damage. It was relayed to the National Weather Service that several homes in the community of Koshkonong had windows that were blown out. Roof damage was widespread in all communities of Oregon County.

• Thayer PwsServes 2,200 · Groundwater · Local governmentNo health violations+4 monitoring or reporting
• Alton PwsServes 1,000 · Groundwater · Local governmentNo health violations
• Oregon County Pwsd 1Serves 900 · Groundwater · Local governmentNo health violations+3 monitoring or reporting
• Koshkonong PwsServes 212 · Groundwater · Local governmentNo health violations+1 monitoring or reporting
• Oregon County Pwsd 2Serves 120 · Groundwater · Local government1 health violation+5 monitoring or reporting