FEMA flood zones · Ohio

Monroe County, Ohio Flood Zone Map

108 flood insurance claims·$1.2M paid·7 federal flood & hurricane disasters

4% of Monroe 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 Monroe County, Ohio. 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 Monroe County floods

Flash flooding from severe storms and heavy rainfall dominates the flood risk profile in Monroe County, Ohio, accounting for 48 recorded events and one death alongside 27 general flood events over the last 30 years. This risk is driven by intense weather patterns, such as the event from April 2024 when a slow-moving trough created an area of converging moisture, dropping four to five and a half inches of rain across the region over a four-day span and prompting widespread flash flood problems across the Ohio River Valley.

National Flood Insurance Program claims data demonstrate that property damage occurs across multiple zones, with the highest concentration of claims occurring in high-risk areas. Specifically, Zone A accounts for 70 claims with an average payout of $15,589 and an average recorded water depth of 27 inches. Additional claims are distributed across moderate and minimal risk zones, including 13 claims in Zone X_SHADED averaging a $9,080 payout and 23 inches of water, 12 claims in Zone UNKNOWN averaging $4,755 and 2 inches of water, 11 claims in Zone X averaging $13,773 with zero average recorded water depth, and 2 claims in Zone X_UNSHADED averaging $13,200 with an average water depth of 61 inches.

Homeowners, real estate agents, and journalists should pay the most attention to properties located within Zone A, which receives the heaviest concentration of flood claims, as well as structures in shaded and unshaded Zone X areas where significant average water depths and insurance payouts indicate substantial localized flood vulnerability.

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

Where the flood claims came from

18% of Monroe 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 25 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 2004, with 52 claims and $927,271 paid, the year of Severe Storms, Flooding, Mudslides, and Landslides, Severe Storms and Flooding and Severe Winter Storms, Flooding, and Mudslides.

1978: 1 claims1979: 2 claims1980: 4 claims1981: 2 claims1984: 2 claims1985: 1 claims1987: 1 claims1994: 1 claims1996: 4 claims1997: 1 claims1998: 21 claims1999: 1 claims2001: 2 claims2003: 1 claims2004: 52 claims2005: 8 claims2010: 1 claims2011: 1 claims2013: 1 claims2024: 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

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

Federal disasters

22 federal disaster declarations since 1968, 7 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms, Flooding, And LandslidesFeb 5, 2019
Severe Storms, Landslides, And MudslidesFeb 14, 2018
Severe StormsJun 29, 2012
Severe Storms And Straight-line WindsJun 29, 2012
Severe Storms And FloodingApr 4, 2011
Hurricane Katrina EvacuationAug 29, 2005
Severe Winter Storms, Flooding, And MudslidesDec 22, 2004
Severe Storms And FloodingAug 27, 2004

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

Recorded flood events

75 since 1996: 48 flash floods and 27 river or area floods.

EventDateDamage
FloodJan 25, 2024—
FloodJan 9, 2024—
FloodApr 3, 2024$1,000
Flash FloodApr 2, 2024—
FloodJan 3, 2023—
FloodMay 6, 2022$10,000
FloodFeb 4, 2022$1,000
Flash FloodJun 19, 2019—

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

From the storm reports

Flood · Jan 25, 2024. Rainfall of 1 to 1.5 inches on already wet ground created some small-stream and road flooding issues in portions of eastern Ohio.

Flood · Jan 9, 2024. A strong surface low pressure center was located over the middle Mississippi Valley during the morning of January 9th, and tracked across Ohio and the eastern Great Lakes through the 10th. Wind gusts of up to 55 MPH were recorded in Eastern Ohio. Also, numerous reports of rainfall in the range of 1 to 1.75 inches were received from area rain gauges. This rain created minor flooding issues on Duck Creek, with othe…

Flood · Apr 3, 2024. Several rounds of showers and thunderstorms prompted a widespread flash flood problems across the Ohio River Valley on April 2nd to April 3rd. The synoptic pattern across the CONUS was a slow moving and deep elongated trough over the Great Plains phasing with a ejecting trough over the Midwest that created an area of converging moisture over eastern Ohio and western Pennsylvania. Overall, over a span of 4 days, fo…

Flash Flood · Apr 2, 2024. Several rounds of showers and thunderstorms prompted a widespread flash flood problems across the Ohio River Valley on April 2nd to April 3rd. The synoptic pattern across the CONUS was a slow moving and deep elongated trough over the Great Plains phasing with a ejecting trough over the Midwest that created an area of converging moisture over eastern Ohio and western Pennsylvania. Overall, over a span of 4 days, fo…

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 Monroe County

If a building in Monroe 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.