FEMA flood zones · Wisconsin

Kenosha County, Wisconsin Flood Zone Map

334 flood insurance claims·$5.2M paid·3 federal flood & hurricane disasters

12% of Kenosha County’s area is in FEMA’s high-risk flood zones, and another 1% in shaded X (mostly the 0.2% floodplain and areas behind levees).

Share of the whole county outline, rivers and lakes included; parts FEMA hasn’t mapped count as zero.

Coastal high risk (V, VE)FloodwayHigh risk (A, AE)Moderate (X, 500-year)Minimal (X)Undetermined (D)

Shaded areas are FEMA’s mapped flood hazard zones in and around Kenosha County, Wisconsin. Zoomed out they are simplified; at street level the map switches to FEMA’s exact layer. Tap anywhere to check that spot, or search an address above.

How Kenosha County floods

River and flash flooding from storms dominate the flood profile of Kenosha County, supported by 41 general flood events, 22 flash flood events, and 4 lakeshore flood events recorded over the last 30 years. Recent impacts include a flash flood event on July 15, 2024, driven by thunderstorms along a cold front, and minor river flooding along the Fox River near New Munster on March 1, 2023, following heavy rain on melting snowpack and frozen ground.

National Flood Insurance Program records show claims across multiple zones, indicating risk extends beyond primary floodways. Zone A accounts for the highest volume with 234 claims averaging a payout of $21,302 and an average recorded water depth of 6 inches. Meanwhile, Zone X properties recorded 64 claims with an average payout of $21,885 and an average recorded water depth of 8 inches, while smaller numbers of claims occurred in unknown zones and shaded or unshaded X zones.

Homeowners, real estate agents, and journalists should pay the closest attention to properties located within designated Zone A riverine areas and Zone X locations, both of which demonstrate significant historical claim frequencies and average water depths exceeding half a foot during flood events.

Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.

Where the flood claims came from

6% of Kenosha County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

249 NFIP claims with a recorded rated flood zone, 1978 to date. The zone is the one FEMA used to rate that policy, which may not match today’s map. Source: OpenFEMA NFIP claims.

How deep the water got

outlet80″ door12″24″36″48″60″72″84″

In flood insurance claims here that reported a flood depth, the average was 6 inches.

Drawn to scale against an 80-inch door. Even a few inches soaks flooring, the bottom of the drywall and anything plugged in near the floor.

Average of the depths reported on claims (zero and implausible values left out); FEMA’s record doesn’t say exactly where each depth was measured. Source: OpenFEMA NFIP claims.

Flood claims, year by year

The worst year was 2017, with 62 claims and $2.3M paid.

1978: 2 claims1979: 15 claims1980: 2 claims1981: 1 claims1982: 3 claims1983: 4 claims1985: 1 claims1986: 6 claims1987: 1 claims1988: 1 claims1989: 1 claims1990: 3 claims1993: 17 claims1994: 16 claims1996: 4 claims1997: 4 claims1999: 10 claims2000: 16 claims2001: 3 claims2004: 23 claims2005: 1 claims2007: 27 claims2008: 34 claims2009: 19 claims2010: 3 claims2011: 3 claims2012: 1 claims2013: 17 claims2017: 62 claims2018: 2 claims2019: 13 claims2020: 4 claims2022: 1 claims2023: 1 claims2026: 13 claims19801990200020102020

Bar height is scaled by square root so ordinary years stay visible next to the worst one. NFIP claims by year of loss. Source: OpenFEMA.

In their words

37 NOAA storm reports from Kenosha County describe what happened, in the words of the forecasters who covered it. Read the Wisconsin flood stories →

Federal disasters

15 federal disaster declarations since 1973, 3 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter Storm And FloodingJan 10, 2020
Severe Winter Storm And SnowstormJan 31, 2011
Severe Storms, Tornadoes, And FloodingJun 5, 2008
Record Snow And Near Record SnowFeb 5, 2008
Severe Storms And FloodingAug 18, 2007
Hurricane Katrina EvacuationAug 29, 2005
Severe Storms And FloodingMay 7, 2004
SnowDec 11, 2000

Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.

Recorded flood events

67 since 1996: 22 flash floods, 41 river or area floods and 4 coastal floods or surges.

EventDateDamage
Flash FloodJul 15, 2024$2,000
FloodApr 2, 2024$5,000
FloodFeb 28, 2023$5,000
Flash FloodAug 14, 2023$20,000
FloodMar 1, 2023—
FloodApr 30, 2020$2,000
FloodMay 17, 2020$5,000
Lakeshore FloodJan 11, 2020$3.3M

— = no damage estimate in the record. Source: NOAA Storm Events Database.

From the storm reports

Flash Flood · Jul 15, 2024. A complex of thunderstorms along a cold front moved across southern Wisconsin causing locally damaging winds, large hail and flash flooding. A tornado occurred near Evansville.

Flood · Apr 2, 2024. After a very wet March and an early April rain and snowstorm, river flooding ensued for the first couple weeks in April for southeast WI.

Flood · Feb 28, 2023. A few creeks and rivers reached minor flood stage over southeast WI after 1.5-2.0 inches of rain fell on a melting, shallow snowpack and frozen ground.

Flash Flood · Aug 14, 2023. A slow moving, strong low pressure area brought several hours of moderate to heavy rainfall to southern WI. Street flooding occurred in urban areas.

National Weather Service narratives, lightly trimmed. Source: NOAA Storm Events Database.

The zones you’ll see on the map

Every colour on the map above is a place on this drawing: where the ground sits relative to the flood FEMA plans for.

Cross-section of a river floodplainDiagram: a river valley. The floodway is the channel and the land beside it; the 1%-annual-chance flood surface (the base flood elevation) covers the valley floor as zone A or AE; a narrow band higher up is shaded X, the 0.2% floodplain; higher ground is X.0.2% CHANCE A YEAR (500-YEAR)BASE FLOOD ELEVATION · 1% A YEARXAEFloodwayAEX
  1. A / AE Inside the 1%-a-year floodplain: about a 26% chance of flooding over a 30-year mortgage. AE has a mapped base flood elevation; plain A does not.
  2. Floodway The channel and the land beside it that has to be kept clear enough to carry the flood. Building here is tightly limited.
  3. X shaded The 0.2% (500-year) floodplain, plus some levee-protected and very shallow flood areas.
  4. X Outside both lines. No federal requirement to insure, which is not the same as no risk.

Every flood zone code explained →

Flood insurance in Kenosha County

If a building in Kenosha County is in a high-risk zone (A or V) and its mortgage comes from a federally regulated or insured lender, or is federally backed, flood insurance is required.

Outside those zones it is optional, and often worth having: from 2014 to 2024 nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area. Since Risk Rating 2.0, NFIP premiums are set for each building, so the only reliable price is a quote: FloodSmart.gov or a local agent.