FEMA flood zones · Illinois

Jackson County, Illinois Flood Zone Map

118 flood insurance claims·$2.1M paid·5 federal flood & hurricane disasters

27% of Jackson County’s area is in FEMA’s high-risk flood zones.

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 Jackson County, Illinois. 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 Jackson County floods

Jackson County, Illinois experiences a flood risk profile dominated by regular river floods, with 159 flood events and one death recorded alongside 44 flash flood events over the last 30 years. NOAA storm reports illustrate this hazard, including a heavy rainfall band that dropped 3 to 5 inches across parts of the county on September 23, 2024, and stationary storms that caused flash flooding issues in Murphysboro on July 13, 2024.

National Flood Insurance Program records show claims spanning multiple zones, highlighting distinct risk levels across the area. Zone A accounts for the highest claim volume with 70 filings averaging a $15,677 payout and an average recorded water depth of 6 inches. Meanwhile, Zone X properties logged higher average severities despite fewer claims, with 10 claims averaging a $42,119 payout and an average recorded water depth of 31 inches, and 11 claims in Zone X Unshaded averaging an $84,189 payout with an average water depth of 4 inches.

Homeowners, real estate agents, and journalists should pay the closest attention to properties located within Zone A and Zone X, where historical claim counts and average payout severities indicate significant exposure to flood waters.

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

Where the flood claims came from

18% of Jackson County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

85 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 7 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 2008, with 29 claims and $120,591 paid.

1978: 1 claims1979: 2 claims1980: 1 claims1982: 3 claims1983: 3 claims1985: 1 claims1987: 1 claims1990: 2 claims1993: 15 claims1994: 1 claims1995: 4 claims1996: 6 claims1998: 3 claims1999: 2 claims2000: 1 claims2001: 1 claims2005: 1 claims2006: 2 claims2008: 29 claims2009: 4 claims2011: 19 claims2012: 1 claims2014: 2 claims2015: 3 claims2016: 2 claims2017: 2 claims2018: 1 claims2019: 1 claims2023: 2 claims2024: 1 claims2025: 1 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

77 NOAA storm reports from Jackson County describe what happened, in the words of the forecasters who covered it. Read the Illinois flood stories →

Federal disasters

15 federal disaster declarations since 1969, 5 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms And FloodingFeb 24, 2019
Severe Storms And FloodingApr 19, 2011
Severe Storms, Flooding, And TornadoesMay 8, 2009
Hurricane Katrina EvacuationAug 29, 2005
Record/near Record SnowDec 21, 2004
Severe Storms, Tornadoes And FloodingApr 21, 2002
Severe Storms And FloodingApr 28, 1996
Severe Storms And FloodingMay 15, 1995

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

Recorded flood events

203 since 1996: 44 flash floods and 159 river or area floods.

EventDateDamage
FloodSep 23, 2024—
Flash FloodJul 13, 2024—
FloodJul 13, 2024—
Flash FloodJul 13, 2024$30,000
FloodMay 10, 2024—
Flash FloodMay 8, 2024—
FloodMar 26, 2023—
Flash FloodJul 19, 2023$25,000

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

From the storm reports

Flood · Sep 23, 2024. A SW to NE oriented heavy rainfall band crossed Southern Illinois during the late evening hours of the 23rd. A second band formed ahead of the first, and then merged together resulting in a localized higher rainfall total swath of 3-5 inches from Southeast Jackson County through Northwest Williamson County into Southern Franklin County. The highest observed rainfall total was a CoCoRaHS site 2 miles ESE of Bush, I…

Flash Flood · Jul 13, 2024. Isolated thunderstorms developed during the afternoon hours on the 12th in the Quad State. Wind damage occurred in the town of Sesser, including tree and powerline damage. Storms from the previous evening in Sesser might have made some trees more susceptible to damage. Meanwhile, torrential rainfall with nearly stationary storms near Tamaroa produced flash flooding. Isolated storms continued overnight as heavy rai…

Flood · Jul 13, 2024. Isolated thunderstorms developed during the afternoon hours on the 12th in the Quad State. Wind damage occurred in the town of Sesser, including tree and powerline damage. Storms from the previous evening in Sesser might have made some trees more susceptible to damage. Meanwhile, torrential rainfall with nearly stationary storms near Tamaroa produced flash flooding. Isolated storms continued overnight as heavy rai…

Flood · May 10, 2024. Heavy rainfall in early May, culminating in the May 8th severe weather and flooding event, resulted in rising river levels on the Lower Ohio, Big Muddy, and Mississippi Rivers, with Thebes returning to minor flood and Murphysboro, Olmsted, and Cairo reaching flood stage shortly after. Minor flooding in Southern Illinois around these river sites lasted 5 to 8 days with impacts limited to low-lying 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 Jackson County

If a building in Jackson 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.