McDonough County, IL Environment & Hazard Risk
Very Low natural hazard risk, led by drought. 684 storm events since 1996.
- Expected yearly loss
- $10.05M
- Very Low nationally
- Storm events since 1996
- 684
- Most often thunderstorm wind
- Flood insurance policies
- 8
- 0.1% of homes
- Hurricanes nearby
- 0
- Since 1851
Natural hazard risk
FEMA National Risk Index, December 2025
Overall risk
Very Low
Score 37.5 of 100
Social vulnerability
Relatively High
Score 61.9 of 100
Community resilience
Relatively High
Score 74.3 of 100
Community resilience runs the other way: a higher rating means a community can recover faster.
Building value exposed: $3.35B · Agriculture value exposed: $276M · Risk-adjusted yearly loss: $12.27M
Risk by hazard
- DroughtRelatively Moderate$975K/yr expected annual loss, about 4.2 events a year
- Heat waveRelatively Moderate$1.43M/yr expected annual loss, about 9.0 events a year
- HailRelatively Moderate$584K/yr expected annual loss, about 3.8 events a year
- Cold waveRelatively Moderate$2.08M/yr expected annual loss, about 4.4 events a year
- Strong windRelatively Moderate$893K/yr expected annual loss, about 5.3 events a year
- Ice stormRelatively Moderate$148K/yr expected annual loss, about 1.1 events a year
- LandslideVery Low$2,558/yr expected annual loss, about once every 6 years
- EarthquakeRelatively Low$380K/yr expected annual loss, about once every 604 years
- Winter weatherRelatively Low$61.95K/yr expected annual loss, about 11 events a year
- TornadoRelatively Low$1.14M/yr expected annual loss, about once every 2 years
- LightningRelatively Low$180K/yr expected annual loss, about 46 events a year
- HurricaneVery Low$5,281/yr expected annual loss, about once every 100 years
- WildfireVery Low$290/yr expected annual loss, about once every 43,185 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.
Flood risk and insurance
National Flood Insurance Program and FEMA flood maps
Check the flood zone for an address
- Homes with flood insurance
- 8 of 9,845 (0.1%)
- Homes in high-risk flood zones
- 0
- Flood claims since 1978
- 16
- Claims paid since 1978
- $133K
Flood claims paid per year
- Mid-spring storms$63.15K · 2 claims
- Midwest Flooding$35.61K · 2 claims
Storm history
Since 1996: 684 events, 0 deaths, $34.03M in damage
- Thunderstorm Wind209
- Hail159
- Winter Storm53
- Flash Flood47
- Winter Weather41
- Flood31
- Tornado27
- Heavy Rain25
- Drought15
- Heavy Snow13
Events per year
44 tornadoes on record (EF0 5, EF1 7, EF2 2, F0 9, F1 9, F2 4, F3 2).
Most damaging storms
Since 1996, ranked by deaths, injuries and damage
- Drought07/01/2005
Mcdonough
$12.95M 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.
- Frost/Freeze05/03/2005
Mcdonough
$8.25M damage
What happened
Record breaking cold settled over the Midwest during the early morning hours of 3 May 2005. The cold was of such intensity that all time record minimums for the month of May were tied or shattered at most first order stations and many co-operative stations. Farmers that took advantage of the unseasonably mild weather during the first half of April had to replant after crops were killed off by the freeze. In some cases, crops had to be replanted even though the growing point was below the surface. This was due to the soil being a sandy loam which allowed freezing temperatures to penetrate into the ground.
- Drought08/01/2005
Mcdonough
$3.16M 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 Wind60 kt wind06/25/2003
Colchester, Mcdonough County
$1.95M damage
What happened
Power lines down
- Thunderstorm Wind60 kt wind06/25/2003
Bushnell, Mcdonough County
$1.95M damage
What happened
Power lines down
- Thunderstorm Wind60 kt wind06/25/2003
Industry, Mcdonough County
$1.95M damage
What happened
Power lines down
Latest storm reports
Newest first
- Thunderstorm Wind65 kt wind07/21/2026
Colmar, Mcdonough County
- Hail1" hail06/17/2026
Adair, Mcdonough County
- Flash Flood06/17/2026
Colchester, Mcdonough County
- Flash Flood06/11/2026
Macomb, Mcdonough County
- Tornado0.08 mi path, 10 yd wide06/11/2026
Argyle Lake Sp, Mcdonough County
- Thunderstorm Wind50 kt wind06/11/2026
Macomb, Mcdonough County
- Funnel Cloud06/11/2026
Colmar, Mcdonough County
- Thunderstorm Wind50 kt wind04/27/2026
Macomb, Mcdonough County
Drinking water
14 community water systems serve about 33,078 people. Violations since 2021.
4 systems had health-based violations, such as a contaminant over the legal limit or a missed treatment step. 1 system had a violation of any kind still open at last report.
- MacombServes 15,051 · Surface water · Local government4 health violations+6 monitoring or reporting
- Western Illinois UniversityServes 8,000 · Purchased surface water · StateNo health violations+1 monitoring or reporting
- BushnellServes 2,972 · Groundwater · Local governmentNo health violations
- West Prairie Water Co-OpServes 2,395 · Purchased groundwater · Local governmentNo health violations+2 monitoring or reporting
- ColchesterServes 1,395 · Purchased surface water · Local governmentNo health violations
- BlandinsvilleServes 569 · Surface water · Local governmentNo health violations
- Good HopeServes 536 · Groundwater · Local governmentNo health violations+2 monitoring or reporting
- IndustryServes 475 · Purchased groundwater · Local government2 health violations+1 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 Prairie City 2s, 15 mi from the county center
Summer highs peak around 86°F in Jul and winter lows bottom out near 16°F in Jan. About 38.5 inches of rain falls in a typical year, with 21.3 inches of snow.
| Month | High | Low | Rain | Snow |
|---|---|---|---|---|
| Jan | 33°F | 16°F | 1.91 in | 5.7 in |
| Feb | 38°F | 19°F | 1.92 in | 6.0 in |
| Mar | 51°F | 29°F | 2.68 in | 2.5 in |
| Apr | 64°F | 40°F | 3.79 in | 1.0 in |
| May | 74°F | 52°F | 5.05 in | - |
| Jun | 82°F | 62°F | 4.82 in | - |
| Jul | 86°F | 64°F | 4.10 in | - |
| Aug | 84°F | 63°F | 3.21 in | - |
| Sep | 78°F | 55°F | 3.77 in | - |
| Oct | 66°F | 43°F | 2.99 in | - |
| Nov | 50°F | 31°F | 2.42 in | 1.1 in |
| Dec | 38°F | 22°F | 1.80 in | 5.0 in |
| Year | 52°F average | 38.5 in | 21.3 in | |
Pollution sites
0 Superfund sites and 2 toxic release facilities in McDonough County
Superfund sites
None in this county.
Toxic release facilities
- Ntn-Bower Corp3.9 lbs released, Macomb
- Trioak Foods LLC0 lbs released, Bushnell
Total: 3.9 lbs in 2024, 1.2 lbs to air.
Superfund sitesToxic release facilitiesEPA inspections and enforcementAir toxics cancer risk6 historic places
Frequently asked questions
- How risky is McDonough County for natural disasters?
- FEMA rates McDonough County very low for overall natural hazard risk, with expected losses of $10.05M a year. The highest-rated hazards are drought (relatively moderate), heat wave (relatively moderate), hail (relatively moderate).
- What storms are most common in McDonough County?
- Since 1996, NOAA recorded 684 storm events affecting McDonough County, most often thunderstorm wind (209), hail (159), winter storm (53).
- How many tornadoes have hit McDonough County?
- 44 tornadoes have been recorded in McDonough County since 1950, including 2 rated F3/EF3 or stronger.
- How many homes in McDonough County have flood insurance?
- 8 residential flood insurance policies are in force in McDonough County, covering about 0.1% of homes. The program has paid $133K on 16 claims here since 1978.
- What is the weather like in McDonough County?
- At Prairie City 2s, average highs reach 86°F in Jul and lows fall to 16°F in Jan, with 38.5 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.