FEMA flood zones · Indiana

Ohio County, Indiana Flood Zone Map

17 flood insurance claims·$110,874 paid·3 federal flood & hurricane disasters

13% of Ohio 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 Ohio County, Indiana. 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 Ohio County floods

Flash flooding and general riverine flooding occur with near-equal frequency across the region, driven by 17 flash flood events and 15 flood events over the last 30 years. Heavy rainfall systems frequently trigger these incidents, such as when 1.5 to 2.5 inches of rain overspread the area ahead of a low-pressure system in February 2022 and produced widespread flooding. Slow-moving showers and thunderstorms in warm, humid airmasses in September 2022, as well as strong thunderstorms ahead of a cold front in February 2018, have also caused flash flooding.

National Flood Insurance Program records show claims filed across multiple flood zones. Zone A leads the claim count with 8 claims averaging a payout of $10,15 and an average recorded water depth of 4 inches. Zone X_UNSHADED accounts for 5 claims averaging $7,615 with an average recorded water depth of 5 inches. Zone UNKNOWN recorded 2 claims averaging $1,376 with an average recorded water depth of 3 inches, while Zone X recorded 2 claims averaging $7,558 with an average recorded water depth of 0 inches.

Homeowners and real estate professionals with properties in Zone A and Zone X_UNSHADED should pay the closest attention to flood risk, as these areas account for the majority of historical insurance claims and recorded water depths in the county.

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 1997, with 10 claims and $85,757 paid, the year of Severe Storms and Flooding.

1978: 2 claims1990: 1 claims1996: 1 claims1997: 10 claims2011: 1 claims2014: 1 claims2018: 1 claims1980199020002010

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

2 NOAA storm reports from Ohio County describe what happened, in the words of the forecasters who covered it. Read the Indiana flood stories →

Federal disasters

19 federal disaster declarations since 1968, 3 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter StormJan 23, 2026
Severe Storms And FloodingFeb 14, 2018
Severe Storms, Tornadoes, Straight-line Winds, AndApr 19, 2011
Severe Winter StormJan 26, 2009
Severe Storms And FloodingSep 12, 2008
Severe Storms, Flooding, And TornadoesMay 30, 2008
Hurricane Katrina EvacuationAug 29, 2005
SnowDec 21, 2004

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

Recorded flood events

32 since 1996: 17 flash floods and 15 river or area floods.

EventDateDamage
FloodFeb 17, 2022—
Flash FloodSep 3, 2022$55,000
Flash FloodFeb 24, 2018—
FloodAug 16, 2018—
Flash FloodApr 23, 2011$1,000
Flash FloodMar 12, 2006—
FloodMar 28, 2005—
FloodAug 19, 2005—

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

From the storm reports

Flood · Feb 17, 2022. Rain overspread the region through the day ahead of a low pressure system moving through the Ohio Valley. Rainfall amounts of 1.5 to 2.5 inches produced widespread flooding.

Flash Flood · Sep 3, 2022. Slow moving showers and thunderstorms developed during the afternoon hours in a warm and humid airmass.

Flash Flood · Feb 24, 2018. Strong thunderstorms, with very heavy rainfall, developed ahead of cold front and caused flash flooding.

Flood · Aug 16, 2018. Numerous rounds of thunderstorms produced heavy rain and isolated flooding.

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 Ohio County

If a building in Ohio 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.