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Lee County, Illinois

Natural disaster risk, federal disaster history and flood insurance facts.

Relatively Low overall risk
52nd of 102highest risk in Illinois
$21Mexpected losses a year
8federal declarations
1 in 167homes with flood insurance
Photo: U.S. Geological Survey, public domain

Lee County, Illinois has a relatively low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is higher than 54% of US counties. It ranks 52nd of 102 counties in Illinois. The costliest hazards here are inland flooding, tornadoes and cold waves. FEMA estimates about $21 million a year in expected losses, or roughly $605 per resident. Since 1973 it has been included in 8 federal disaster or emergency declarations for natural events (5 major disasters). The most recent was in September 2019 (severe storms and flooding). Fewer than 1 in 100 homes here carry federal flood insurance (93 policies). Since 1978, federal flood insurance has paid about $730,000 on 142 claims here.

FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.

Top risks in Lee County

$11.2 million a yearExpected losses. Damaging events about once a year.
  • Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
  • Price a flood policy now. Most new federal policies take 30 days to start.

Tornado

Moderate
$2.9 million a yearExpected losses. Damaging events about once every 2 years.
  • Pick a shelter spot: a basement, or an inside room on the lowest floor with no windows.
  • Turn on emergency alerts on your phone and keep a weather radio.

Cold wave

Moderate
$2.3 million a yearExpected losses. Damaging events about 6 times a year.
  • Insulate pipes in outside walls, crawl spaces and garages.
  • Know how to shut off the main water valve.
HazardRatingScoreExpected loss a year
Inland floodingLow62.5
$11M
TornadoModerate69.8
$3M
Cold waveModerate68.7
$2M
Strong windHigh84.6
$2M
DroughtModerate79.6
$1M
HailLow72.4
$712K
EarthquakeVery Low49.6
$308K
Heat waveVery Low31.9
$172K
LightningLow28.8
$119K
Ice stormLow42.2
$68K
Winter weatherLow29.6
$33K
HurricaneVery Low15.7
$5K
WildfireVery Low9.4
$3K
LandslideVery Low37.5
$635

Scores are percentiles: a score of 90 means higher risk than about 90% of US counties for that hazard. Hazards FEMA does not rate here are left out. Social vulnerability is relatively low and community resilience is very high in FEMA's measures.

Federal disaster history

Recent disasters nationwide ›

Declarations by decade

Federal declarations for natural events that included Lee County. 2020s bar runs to November 2026.

By type

Flood4
Snowstorm3
Hurricane1

Most recent

Sep 19, 2019Severe Storms and FloodingMajor disaster
Mar 17, 2011Severe Winter Storm and SnowstormMajor disaster
Dec 29, 2006SnowEmergency
Sep 7, 2005Hurricane Katrina EvacuationEmergency
Mar 29, 1985Severe Storms & FloodingMajor disaster
Jan 16, 1979Blizzards & SnowstormsEmergency
Jun 10, 1974Severe Storms & FloodingMajor disaster
Apr 26, 1973Severe Storms & FloodingMajor disaster

Illinois also had 2 statewide declarations that did not name single counties.

Storm history since 1956

Tornado risk by county ›

The National Weather Service has logged 391 storm reports in Lee County since 1956, with 0 deaths and 15 injuries and about $3.3 million in reported damage. The strongest on record here was an EF2 tornado on June 22, 2015 near Maytown.

39tornadoes
115hail reports, largest 4 inches
204damaging thunderstorm winds
28floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
Jun 22, 2015EF2Maytown7 / 0
Aug 15, 1958F2–0 / 0
Apr 6, 1972F2–6 / 0
Apr 21, 1967F2–0 / 0
Aug 30, 1956F2–0 / 0

Most damaging storms

DateTypeNearDamage
Apr 9, 2015TornadoFranklin Grove$1M
Jun 22, 2015TornadoMaytown$1M
Aug 15, 1958Tornado–$250K
Apr 21, 1967Tornado–$250K
Apr 6, 1972Tornado–$250K
Oct 26, 2010TornadoAshton$100K

Source: NOAA Storm Events Database, county-based reports through Jul 3, 2026. Tornado records start in 1950, hail and wind in 1955, and floods and other storm types in 1996, so older decades undercount. Damage is in dollars of the year it happened and is often an estimate. Winter storms, heat and hurricanes are logged by forecast zone, not county, so they are not counted here.

Flood insurance in Lee County

Check your address flood zone ›
0.6%of homes have federal flood insurance (93 policies)
14.1%of homes in mapped high-risk flood zones are insured
$730,450paid on 142 flood claims since 1978
1994costliest year, with $234,226 paid

National Flood Insurance Program (NFIP) records only; private flood policies are not included. Home counts as of Aug 3, 2026. Since 2021 NFIP prices each home separately under Risk Rating 2.0, so your price depends on the building, not the county. Ask an agent for a quote.

Homes in Lee County

$154,600median home value (Illinois $263,300, US $332,700)
1960median year homes were built (Illinois 1971, US 1980)
72%of homes built before 1980, before many modern wind, quake and flood building rules
5.4%of homes are mobile homes, which are the least safe in tornadoes and high winds

Older homes and mobile homes usually suffer more damage in storms, floods and earthquakes, and can cost more to insure. If you are buying, ask about roof age, foundation bolting and any retrofits. Source: US Census Bureau, American Community Survey 2020 to 2024 5-year estimates; 14,995 housing units.

Compare in Illinois

All 102 ›
Largest countiesOverall riskTop hazard
Cook CountyVery HighInland flooding
DuPage CountyHighInland flooding
Lake CountyHighInland flooding
Will CountyHighInland flooding
Kane CountyHighInland flooding
McHenry CountyModerateInland flooding
Winnebago CountyModerateInland flooding
Madison CountyModerateInland flooding

Neighboring counties

CountyOverall riskDeclarations
LaSalle CountyModerate18
DeKalb CountyLow10
Whiteside CountyLow12
Ogle CountyLow12
Bureau CountyLow15

Common questions about Lee County

What is the biggest natural hazard in Lee County?

Inland flooding has the highest expected yearly losses in Lee County, about $11.2 million a year in FEMA's estimate. Tornado is second at $2.9 million.

How many federal disasters has Lee County had?

Lee County has been included in 8 federal disaster or emergency declarations for natural events since 1973, including 5 major disasters. The most recent was Severe Storms and Flooding in September 2019.

Is Lee County a high-risk place to live?

Its overall rating is Relatively Low, 52nd highest of 102 in Illinois. A county rating covers the whole area. Risk at one address can be much higher or lower, so check the FEMA flood map and ask about the home's history.

Do I need flood insurance in Lee County?

Standard home insurance does not cover flooding. About 1 in 167 homes in Lee County has federal flood insurance. Lenders require it in mapped high-risk zones, but many flood claims come from outside those zones.

How many tornadoes has Lee County had?

NOAA records list 39 tornadoes in Lee County since 1950. The strongest was an EF2 tornado on June 22, 2015 near Maytown. The weather service has also logged 115 hail reports and 28 floods here.

Sources: FEMA National Risk Index (December 2025), OpenFEMA Disaster Declarations Summaries, and NFIP policy and claims data. Hazard Compass is independent and not affiliated with FEMA. These figures describe the whole county, not a single property, and are not insurance or safety advice. Report a problem.