Enter any address in Johnson County, Kansas to see its FEMA flood zone
Flash flooding from severe thunderstorms dominates the flood character of Johnson County. Between 2021 and 2024, NOAA Storm Events data recorded 84 flash flood events and 25 general flood events in the county. For example, on July 17, 2023, a cluster of severe thunderstorms brought numerous reports of flash flooding to the Kansas side of the KC Metro area. More recently, on July 1, 2024, heavy rainfall resulted in flash flooding across much of the county, with some areas receiving up to 7 inches of rain in a three-hour period.
National Flood Insurance Program (NFIP) claims data indicates that properties in Zone A experienced the highest number of claims (497) with an average payout of $14,665 and an average water depth of 1.4 feet. Properties in Zone X also saw significant claims (165) with a higher average payout of $12,903, though with a much deeper average water depth of 4.4 feet. Homeowners in Zone A and Zone X, as well as those in Zone X_SHADED and Zone X_UNSHADED, should pay close attention to flood risk, as all mapped zones have experienced claims.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
13 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Johnson County, Kansas has recorded 109 flood-related events since 1996 according to NOAA's Storm Events Database, including 84 flash floods and 25 river or area floods. The county has received 12 federal disaster declarations, 2 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1969–2023)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Storms, Straight-line Winds, Tornadoes, And Flooding | Severe Storm | Jul 14, 2023 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms, Straight-line Winds, And Flooding | Severe Storm | Jul 22, 2017 |
| Severe Winter Storms | Severe Storm | Dec 6, 2007 |
| Hurricane Katrina Evacuation | Hurricane | Sep 1, 2005 |
| Severe Winter Ice Storm | Severe Ice Storm | Jan 29, 2002 |
| Flooding 10/31/98 | Severe Storm | Oct 30, 1998 |
| Severe Storms, Flooding And Tornadoes | Severe Storm | Oct 1, 1998 |
| Severe Storms & Flooding | Flood | Jun 28, 1993 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jul 17, 2025 | 10.00K |
| Flash Flood | Jul 17, 2025 | 0.00K |
| Flash Flood | Jul 1, 2024 | 0.00K |
| Flash Flood | Jul 14, 2023 | 0.00K |
| Flash Flood | Aug 12, 2021 | 0.00K |
| Flash Flood | May 28, 2020 | 0.00K |
| Flash Flood | Apr 30, 2019 | 0.00K |
| Flash Flood | Jul 27, 2017 | 0.00K |
| Flood | Aug 22, 2017 | 0.00K |
| Flash Flood | Aug 21, 2017 | 0.00K |
Flash Flood — Jul 17, 2025
A cluster of severe thunderstorms moved through portions of eastern Kansas, including the Kansas side of the KC Metro area. Numerous reports of wind damage, severe wind gusts, and flash flooding occured.
Flash Flood — Jul 1, 2024
During the morning and early afternoon hours of July 1st, heavy rainfall yielded flash flooding across much of Johnson County. A swath of 3 to 6 of rain with isolated locations up to 7 fell within about a 3 hour time period from about 930 am to 1230 pm.
Flash Flood — Jul 14, 2023
During the afternoon of July 14, 2023 a strong storm formed in northeast Kansas and eventually transformed into a strong squall line that impacted far eastern Kansas and western Missouri. This storm left a swath of wind damage mainly through the heart of the Kansas City metro area in the form of widespread tree damage. Several structures were impacted by falling trees as the storm moved through...
Flash Flood — Aug 12, 2021
After an initial round of thunderstorms formed and moved out of the area, a second round of thunderstorms formed in the late afternoon to evening that produced some severe hail, that got up to around an inch, with some isolated golfball sized hail.
Flash Flood — May 28, 2020
A few storms in the area produced some gusty winds and minor flooding on the morning of May 28.
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 Johnson County, Kansas:
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 Johnson County, Kansas 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.