Enter any address in Carroll County, Illinois to see its FEMA flood zone
River overflow along the Mississippi and flash flooding from heavy rainfall are the dominant flood types in Carroll County. Recent events include significant Mississippi River flooding in April 2023, caused by snowmelt and saturated soils, which impacted numerous roads, businesses, homes, and people. Additionally, heavy rainfall in June 2024 contributed to widespread showers and storms, leading to flash flooding.
While the National Flood Insurance Program (NFIP) has recorded claims across various flood zones, properties in Zone X_SHADED and Zone X_UNSHADED have experienced higher average payouts and water depths. Homeowners in areas designated as Zone A, as well as those in Zone X (shaded or unshaded) and unknown zones, should pay particular attention to their flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
15 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Carroll County, Illinois has recorded 49 flood-related events since 1996 according to NOAA's Storm Events Database, including 30 flash floods and 19 river or area floods. The county has received 16 federal disaster declarations, 7 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1965–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms And Flooding | Flood | Feb 24, 2019 |
| Severe Storms, Straight-line Winds, And Flooding | Flood | Apr 16, 2013 |
| Severe Winter Storm And Snowstorm | Snowstorm | Jan 31, 2011 |
| Severe Storms And Flooding | Severe Storm | Jul 19, 2010 |
| Record Snow And Near Record Snow | Snowstorm | Feb 5, 2008 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
| Flooding | Flood | Apr 18, 2001 |
| Severe Storms & Flooding | Flood | Apr 13, 1993 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jun 22, 2024 | 0.00K |
| Flood | Jul 7, 2024 | 0.00K |
| Flood | Apr 25, 2023 | 0.00K |
| Flash Flood | Aug 19, 2022 | 0.00K |
| Flash Flood | May 28, 2020 | 0.00K |
| Flood | Apr 27, 2019 | 0.00K |
| Flash Flood | Jun 5, 2019 | 0.00K |
| Flood | Apr 4, 2019 | 0.00K |
| Flood | Oct 2, 2019 | 0.00K |
| Flood | May 1, 2019 | 0.00K |
Flash Flood — Jun 22, 2024
Several rounds of showers and storms were noted shortly after midnight in northwest Illinois, with a resurgence of showers and storms once again in the afternoon and night. These produced heavy rainfall and isolated severe winds.
Flood — Jul 7, 2024
Rain that fell during the month of June across Minnesota and Wisconsin caused rises on the Mississippi River, along the Iowa and Illinois border. Additionally, heavy rain that fell locally in July helped to prolong the crest and delay the river falling below flood stage, especially south of the Wapsipinicon, Rock, and Iowa Rivers.
Flood — Apr 25, 2023
Significant flooding occurred on the mainstem Mississippi largely due to the record snowfall this winter in Minnesota and Wisconsin, frozen ground, rapid snowmelt during the middle of April, and saturated soils. Major flooding was observed at all sites along the Mississippi north of Keokuk Iowa and most sites saw one of their top 10 crests on record.|This flooding had numerous impacts, with ma...
Flash Flood — Aug 19, 2022
A cold core low moved over the area, dragging along a weak and slow moving surface low. Although weak, sufficient low level and upper forcing aided in developing strong to severe storms. Instability and shear were strong enough for a few supercell thunderstorms to develop and bring hail, strong winds, and heavy rain to the area. The storms were slow moving. which allowed some storms to anchor o...
Flash Flood — May 28, 2020
A persistent band of moderate to heavy rain fell across Iowa, northeast Missouri, and northern Illinois the afternoon and early evening of May 28th. This band of rain brought some flash flooding to in northwest Illinois. ||In Illinois, stationary thunderstorms formed over the De Pue area, quickly dropped several inches of rain, and causing a significant flash flood in the small town of De Pue, ...
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Carroll County, Illinois:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Carroll County, Illinois that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.