Putnam County, IL Environment & Hazard Risk

• DroughtRelatively Low$346K/yr expected annual loss, about 8.9 events a year
• LandslideVery Low$1,210/yr expected annual loss, about once every 22 years
• Strong windRelatively Low$463K/yr expected annual loss, about 5.4 events a year
• EarthquakeVery Low$159K/yr expected annual loss, about once every 675 years
• TornadoRelatively Low$622K/yr expected annual loss, about once every 6 years
• Cold waveRelatively Low$483K/yr expected annual loss, about 5.1 events a year
• Ice stormVery Low$17.3K/yr expected annual loss, about once every 1 year
• Heat waveVery Low$60.73K/yr expected annual loss, about 6.5 events a year
• HailVery Low$54.02K/yr expected annual loss, about 3.7 events a year
• Winter weatherVery Low$10.47K/yr expected annual loss, about 15 events a year
• HurricaneVery Low$1,434/yr expected annual loss, about once every 100 years
• LightningVery Low$23.97K/yr expected annual loss, about 44 events a year
• WildfireVery Low$1,444/yr expected annual loss, about once every 13,612 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

10 of 3,299 (0.3%)

Homes in high-risk flood zones

59

Insured in high-risk zones

8 (14%)

Flood claims since 1978

66

Claims paid since 1978

$1.09M

• Thunderstorm Wind89
• Hail60
• Winter Weather50
• Winter Storm49
• Drought15
• Heavy Snow12
• Flash Flood11
• High Wind9
• Dense Fog9
• Ice Storm9

• TornadoF2, 6.8 mi path, 880 yd wide04/20/2004

  Florid, Putnam County

  5 injured, $8M damage

  What happened

  Rated very high end F2

• Drought07/01/2005

  Putnam

  $5.39M 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 Wind61 kt wind05/01/2003

  Putnam, Putnam County

  $3M damage

  What happened

  Bow echo

• Thunderstorm Wind69 kt wind05/01/2003

  Standard, Putnam County

  $1M damage

  What happened

  Supercell thunderstorms developed in the afternoon and evening north of a warm front that ran from Southern Iowa into Central Illinois. Three distinct supercells produced a majority of the wind, hail, and heavy rain reports from Jefferson County Iowa into Henry County Illinois. Mercer County Illinois was under tornado warnings on a continuous basis for 2 hours. Officials at a high school track meet in Aledo, Illinois ushered all students into the safety of the school resulting in no injuries. The training of the supercells from Louisa County Iowa to Henry County Illinois dumped heavy rain over the Edwards River and Pope Creek basins in Illinois with radar estimating 9 inches of rain. Actual amounts varied due to large amounts of hail with the storms. Cambridge Illinois estimated 7 to 8 inches of rain fell in the town. Illinois Route 17 was closed due to flooding between Aledo and Viola with Illinois Route 94 closed south of Aledo. In Andover Illinois, two thirds of the town had basements flooded. Toward the end of the event a bow echo developed in Henry County Illinois and raced east across Bureau and Putnam counties. The fire department in Standard, Illinois measured...

• TornadoEF2, 8.96 mi path, 880 yd wide06/06/2010

  Putnam, Putnam County

  $1M damage

  What happened

  Between approximately 810 pm and 835 pm on June 5, an EF2 tornado moved across areas from about 2.75 miles east northeast of Henry, IL, through Magnolia, IL, into western La Salle County about 3 miles east of Magnolia, IL. Wind speeds were estimated to be 135 mph. The tornado touched down at the shore of Sawmill Lake with a width of about 0.5 miles. Numerous trees were snapped off and shredded, laying in scattered directions. Extensive tree damage and some structural damage was observed toward Taylor Rd. Along County Road 150 N and Highway 18 west of Magnolia, several farm outbuildings including a large barn and steel shed were destroyed. A 400 to 450 foot tall cell phone tower was completely destroyed. |In Magnolia, IL, the tornado caused extensive tree damage across the northern two thirds of town with minor damage to numerous residences. On the north side of town, the tornado ripped the roofs completely off of four structures. The tornado weakened to an EF0 rating as it approached and crossed into La Salle County, where the NWS Chicago Storm Survey Team indicated it lifted about 1.23 miles east of the county line just south of Highway 18.

• Drought08/01/2005

  Putnam

  $635K 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.

• Thunderstorm Wind61 kt wind05/05/2026

  Moronts, Putnam County

• Thunderstorm Wind50 kt wind04/18/2026

  Hennepin, Putnam County

• Thunderstorm Wind52 kt wind04/03/2026

  Granville, Putnam County

• Thunderstorm Wind56 kt wind04/03/2026

  Hennepin, Putnam County

• Thunderstorm Wind53 kt wind04/03/2026

  Hennepin, Putnam County

• Thunderstorm Wind65 kt wind04/03/2026

  Hennepin, Putnam County

• Blizzard03/16/2026

  Putnam

• Hail1" hail03/11/2026

  Mc Nabb, Putnam County

• GranvilleServes 1,359 · Groundwater · Local governmentNo health violations
• Hennepin PwdServes 750 · Groundwater · Local governmentNo health violations
• MarkServes 555 · Groundwater · Local government1 health violation+3 monitoring or reporting
• Lake Thunderbird SubdivsionServes 450 · Groundwater · Private1 health violation+2 monitoring or reporting
• McnabbServes 258 · Groundwater · Local governmentNo health violations+2 monitoring or reporting
• MagnoliaServes 244 · Groundwater · Local governmentNo health violations
• StandardServes 225 · Groundwater · Local governmentNo health violations
• Oak Park EstatesServes 185 · Purchased groundwater · PrivateNo health violations+2 monitoring or reporting