FEMA flood zones · Ohio

Preble County, Ohio Flood Zone Map

48 flood insurance claims·$371,766 paid·1 federal flood & hurricane disasters

7% of Preble 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 Preble 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 Preble County floods

Flash flooding and general flooding occur in nearly equal measure, driven by severe weather systems and heavy rainfall. Over the last 30 years, NOAA records document 38 flash flood events and 35 general flood events. Recent activity includes a low pressure system that brought flooding in April 2024, as well as an approaching cold front that caused localized flooding in March 2022.

National Flood Insurance Program records indicate claims across multiple zones with varying impacts. Properties in Zone A experienced 31 claims with an average payout of $14,808 and an average recorded water depth of 9 inches. In Zone X, 9 claims averaged $11,001 with an average recorded water depth of 24 inches. Zone X_UNSHADED recorded 6 claims with an average payout of $4,667 and an average water depth of 1 inch, while Zone X_SHADED saw 2 claims averaging $1,073 with an average water depth of 0 inches.

Homeowners, real estate agents, and journalists should pay the most attention to properties located within Zone A, which accounts for the highest concentration of insurance claims, as well as properties in Zone X that have recorded significant average water depths during past flood events.

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

Where the flood claims came from

21% of Preble County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

39 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 9 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 1999, with 12 claims and $163,109 paid.

1986: 1 claims1989: 6 claims1995: 1 claims1997: 1 claims1999: 12 claims2000: 1 claims2001: 1 claims2002: 1 claims2003: 7 claims2004: 1 claims2005: 2 claims2006: 1 claims2008: 2 claims2011: 2 claims2012: 1 claims2013: 4 claims2018: 2 claims2020: 1 claims2021: 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

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

Federal disasters

11 federal disaster declarations since 1977, 1 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe StormsJun 29, 2012
Severe Wind Storm Associated With Tropical Depression IkeSep 14, 2008
Hurricane Katrina EvacuationAug 29, 2005
SnowDec 22, 2004
Severe Storms And FloodingAug 27, 2004
Severe Winter Storm And Record/near Record SnowFeb 14, 2003
Severe Storms & FloodingMay 23, 1989
Blizzards & SnowstormsJan 26, 1978

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

Recorded flood events

73 since 1996: 38 flash floods and 35 river or area floods.

EventDateDamage
Flash FloodJul 29, 2024—
FloodApr 11, 2024—
FloodMar 7, 2022—
FloodJun 30, 2021—
FloodJul 16, 2021—
Flash FloodJun 3, 2021$10,000
FloodJun 3, 2021—
Flash FloodJun 3, 2021—

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

From the storm reports

Flash Flood · Jul 29, 2024. An upper level disturbance moving southeast across the region produced showers and thunderstorms during the overnight hours.

Flood · Apr 11, 2024. A low pressure system moving through the Ohio River Valley resulted in occasional showers and thunderstorms.

Flood · Mar 7, 2022. Showers and thunderstorms ahead of an approaching cold front produced localized strong winds and flooding.

Flood · Jun 30, 2021. Thunderstorms developed ahead of a cold front moving through the Ohio Valley. Some of the storms produced heavy rainfall.

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 Preble County

If a building in Preble 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.