Henderson County, IL Environment & Hazard Risk

• DroughtRelatively Moderate$699K/yr expected annual loss, about 8.5 events a year
• HailRelatively Moderate$506K/yr expected annual loss, about 3.9 events a year
• Strong windRelatively Moderate$490K/yr expected annual loss, about 5.4 events a year
• LandslideVery Low$1,607/yr expected annual loss, about once every 8 years
• Heat waveRelatively Low$307K/yr expected annual loss, about 9.0 events a year
• Ice stormRelatively Low$39.5K/yr expected annual loss, about once every 2 years
• LightningRelatively Low$91.47K/yr expected annual loss, about 46 events a year
• TornadoRelatively Low$340K/yr expected annual loss, about once every 3 years
• EarthquakeVery Low$42.95K/yr expected annual loss, about once every 722 years
• Cold waveRelatively Low$225K/yr expected annual loss, about 4.7 events a year
• Winter weatherVery Low$15K/yr expected annual loss, about 13 events a year
• HurricaneVery Low$2,385/yr expected annual loss, about once every 100 years
• WildfireVery Low$480/yr expected annual loss, about once every 4,881 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: avalanche, coastal flooding, riverine flooding, tsunami, volcanic activity.

Check the flood zone for an address

Homes with flood insurance

75 of 3,543 (2.1%)

Homes in high-risk flood zones

183

Insured in high-risk zones

60 (33%)

Flood claims since 1978

412

Claims paid since 1978

$11.53M

• Thunderstorm Wind78
• Hail53
• Winter Weather47
• Winter Storm47
• Flood41
• Flash Flood19
• Drought17
• Heavy Snow11
• Ice Storm11
• Dense Fog9

• Hail4" hail05/09/2003

  Gladstone, Henderson County

  $10M damage

  What happened

  The first of 3 severe weather events occurred across Northeast Missouri, Eastern Iowa, and the Northern third of Illinois. Supercell thunderstorms developed in the late afternoon and evening north of a warm front that was associated with a powerful spring storm system. Favorable moisture and shear profiles allowed the storms to produce large hail and heavy rain. In Fort Madison, Iowa it was reported to be the most hail seen since 1993 with a car dealership reporting damage to about 400 cars on its lot along with numerous cars and buildings. In the Burlington, Iowa area, the most severe damage from the hail was on the south side of the city. Three schools and a golf course were heavily damaged prompting officials to cancel school for students in those buildings until the following Monday.

• Drought08/01/2005

  Henderson

  $9.06M damage

  What happened

  The 2005 drought that started back in June continued through the month of August 2005 and into September 2005. Severe to extreme drought continued across the northern half of Illinois, eastern third of Iowa, and northeast Missouri. Although rainfall was more plentiful during the month, it continued to remain widely scattered. What rainfall did occur helped keep soybean losses to a minimum and preserved what was left of the corn crop. The severe dryness of the drought continued to place it equal to or exceeding the drought of 1988. By the end of August the governor of Iowa had requested areas south and east of a line from Dubuque, to Independence, to Ottumwa (save Buchanan County) be declared an agricultural disaster area.Soybean crop losses generally were estimated at a 10-15% reduction in yield across Illinois, eastern Iowa, and northeast Missouri. There were pockets across eastern Iowa and northeast Missouri where an estimated 20-30% reduction in yield for soybeans was expected.

• TornadoF0, 5 mi path, 50 yd wide04/20/1996

  Oquawka, Henderson County

  $4M damage

  What happened

  At least 2 tornados were responsible for damage to 15 homes, a barn, and many outbuildings. One farm lost one 50,000 bushel and three 2,000 bushel grain bins as well as $20-30,000 of irrigation equipment. Many large and old trees were also snapped off and dumped into the streets and across rural roads, which slowed traffic through the area.

• TornadoF1, 3.5 mi path, 100 yd wide04/20/1996

  Bald Bluff, Henderson County

  $4M damage

  What happened

  At least 2 tornados were responsible for damage to 15 homes, a barn, and many outbuildings. One farm lost one 50,000 bushel and three 2,000 bushel grain bins as well as $20-30,000 of irrigation equipment. Many large and old trees were also snapped off and dumped into the streets and across rural roads, which slowed traffic through the area.

• Drought07/01/2005

  Henderson

  $2.5M damage

  What happened

  The drought that began back in June 2005 continued through July and into August 2005 and spread into Eastern Iowa and Northeast Missouri. The drought became severe to extreme across Northwest and West Central Illinois while it was only severe across Eastern Iowa and Northeast Missouri. The drought combined with high heat during the second half of the month decimated the corn crop. At one point during the month of July, the dryness for the calendar year across parts of the area equalled or exceeded the dry conditions during the drought of 1988. By late June the governor of Illinois had activated the Drought Response Task Force in response to severe drought conditions. By late July much of the state was declared an agricultural disaster area by the USDA.Crop loss estimates varied across the entire area. Across Illinois, the worst losses were along the Illinois River Valley with an estimated 40% yield reduction that decreased to around 25-30% along the Mississippi River Valley. In Iowa, loses rapidly decreased the further west one went from the Mississippi River Valley and were near or just slightly below normal upon reaching an Independence to Oskaloosa Iowa line.

• Thunderstorm Wind55 kt wind07/08/2003

  Gulfport, Henderson County

  1 injured, $220K damage

  What happened

  Trees down & semi overturned

• Thunderstorm Wind52 kt wind06/17/2026

  Biggsville, Henderson County

• Thunderstorm Wind50 kt wind06/17/2026

  Rozetta, Henderson County

• Thunderstorm Wind78 kt wind06/17/2026

  Delabar State Park, Henderson County

• Thunderstorm Wind53 kt wind05/05/2026

  Rozetta, Henderson County

• Hail1.25" hail03/31/2026

  Oquawka, Henderson County

• Hail1" hail03/31/2026

  Rozetta, Henderson County

• Blizzard03/16/2026

  Henderson

• Winter Storm11/29/2025

  Henderson

• Dallas Rural Water DistrictServes 6,370 · Groundwater · Local governmentNo health violations+2 monitoring or reporting
• OquawkaServes 1,125 · Groundwater · Local governmentNo health violations+3 monitoring or reporting
• StronghurstServes 838 · Groundwater · Local governmentNo health violations+3 monitoring or reporting
• GladstoneServes 387 · Groundwater · Local governmentNo health violations+5 monitoring or reporting
• BiggsvilleServes 273 · Purchased groundwater · Local governmentNo health violations+2 monitoring or reporting
• RaritanServes 180 · Purchased groundwater · Local governmentNo health violations
• MediaServes 139 · Purchased groundwater · Local governmentNo health violations+3 monitoring or reporting