FEMA flood zones · Illinois

Christian County, Illinois Flood Zone Map

14 flood insurance claims·$197,744 paid

6% of Christian 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 Christian 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 Christian County floods

Flash flooding from summer thunderstorms dominates the flood risk profile in Christian County, Illinois. Over the last 30 years, the NOAA Storm Events Database recorded 46 flash flood events compared to 7 general flood events, which resulted in 4 deaths.

Severe storms driven by stationary fronts, low pressure systems, and moist airmasses frequently produce heavy rainfall and localized flash flooding across the region. For example, a stationary frontal boundary produced heavy rainfall of 2 to 3 inches and localized flash flooding on May 14, 2023. An outflow boundary interacting with a moist airmass triggered scattered flash flooding during storms on July 20, 2025.

National Flood Insurance Program claims data indicates that property owners in both designated flood hazard areas and outside them have experienced flood losses. Zone A properties recorded 5 claims with an average payout of $8,729 and an average water depth of 13 inches. Zone X properties recorded 4 claims with an average payout of $37,420 and an average water depth of 1 inch. Zone UNKNOWN recorded 3 claims with an average payout of $2,752 and an average water depth of 2 inches. Zone X_UNSHADED recorded 2 claims with an average payout of $2,447 and an average water depth of 1 inch. Homeowners, real estate agents, and journalists should pay the closest attention to properties situated in high-risk Zone A, as well as moderate-to-low risk Zone X areas where heavy localized rainfall can still produce costly damage.

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

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 4 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 2002, with 4 claims and $6,223 paid.

1979: 1 claims1982: 2 claims2000: 1 claims2002: 4 claims2013: 1 claims2015: 3 claims2019: 1 claims2022: 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

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

Federal disasters

8 federal disaster declarations since 1999.

DisasterBegan
Severe Storms And FloodingJun 29, 2023
Severe Winter Storm And SnowstormJan 31, 2011
Severe Winter StormNov 30, 2006
Hurricane Katrina EvacuationAug 29, 2005
Severe Storms, Tornadoes And FloodingApr 21, 2002
Winter Storm 1/1/99Jan 1, 1999

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

Recorded flood events

53 since 1996: 46 flash floods and 7 river or area floods.

EventDateDamage
Flash FloodJul 20, 2025—
Flash FloodMay 14, 2023$3,000
Flash FloodAug 6, 2023—
Flash FloodJun 25, 2022—
Flash FloodJun 17, 2022—
Flash FloodJun 22, 2020—
Flash FloodJun 22, 2019—
Flash FloodAug 16, 2018—

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

From the storm reports

Flash Flood · Jul 20, 2025. An outflow boundary interacting with a very moist airmass characterized by surface dewpoints in the middle to upper 70s triggered clusters of strong to severe thunderstorms across south-central Illinois during the afternoon and evening of July 20th. Scattered wind damage and flash flooding occurred...mainly south of a Shelbyville to Marshall line.

Flash Flood · May 14, 2023. A stationary frontal boundary extending from northern Missouri to western Kentucky triggered clusters of strong to severe thunderstorms across parts of central Illinois during the late afternoon and evening of May 14th. Most of the storms were concentrated along a Rushville...to Springfield...to Salem line. Scattered wind damage and hail as large as golf balls occurred across this area. In addition, heavy rainf…

Flash Flood · Aug 6, 2023. A vigorous short-wave trough interacted with an approaching low pressure system and associated warm frontal boundary to trigger clusters of strong to severe thunderstorms across west-central Illinois during the late afternoon of August 6th. Due to enhanced low-level wind shear along and north of the warm front, many of the cells began rotating and spinning up occasional funnel clouds. One of the cells intensifie…

Flash Flood · Jun 25, 2022. A cold front triggered bands of strong to severe thunderstorms across west-central Illinois during the evening of June 25th. Some of the cells produced wind gusts up to 60mph, resulting in scattered wind damage. In addition, excessive rainfall rates led to localized flash flooding with some of the stronger storms.

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 Christian County

If a building in Christian 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.