FEMA flood zones · Ohio

Lorain County, Ohio Flood Zone Map

538 flood insurance claims·$7.1M paid·4 federal flood & hurricane disasters

7% of Lorain County’s area is in FEMA’s high-risk flood zones, and another 2% in shaded X (mostly the 0.2% floodplain and areas behind levees).

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 Lorain 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 Lorain County floods

Flash flooding from severe summer thunderstorms and heavy rainfall dominates the flood risk profile in Lorain County, Ohio, accounting for 62 events and two deaths over the last 30 years, alongside 17 general flood events and one death, plus two storm surge or tide events.

Recent weather patterns illustrate this hazard, including multicell thunderstorm clusters along a cold front on May 22, 2024, and organized storms fueled by tropical-like precipitable water values exceeding 2.0 inches on August 23, 2023. These high-moisture systems produce rapid runoff and localized inundation.

National Flood Insurance Program records show that flood impacts extend well beyond high-risk areas. Zone A accounts for 330 claims with an average payout of $18,803 and an average recorded water depth of 11 inches. Meanwhile, properties in Zone X have experienced 117 claims with an average payout of $21,225 and an average recorded water depth of 5 inches, and Zone X_SHADED properties recorded 18 claims with an average payout of $23,207 and an average water depth of 7 inches. Zone X_UNSHADED recorded 60 claims averaging $12,630 with a 7-inch average water depth, and Zone UNKNOWN logged 13 claims averaging $1,541 with a 2-inch average water depth. Homeowners and real estate agents in both designated high-risk zones and lower-risk Zone X areas should pay close attention to these historical water depths and claim frequencies.

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

Where the flood claims came from

19% of Lorain County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

408 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 2014, with 120 claims and $2.0M paid.

1978: 15 claims1979: 8 claims1980: 7 claims1981: 9 claims1982: 9 claims1983: 3 claims1984: 8 claims1985: 17 claims1986: 2 claims1987: 3 claims1989: 6 claims1990: 3 claims1992: 1 claims1994: 17 claims1995: 5 claims1996: 8 claims1997: 9 claims1998: 4 claims1999: 2 claims2000: 2 claims2001: 2 claims2003: 2 claims2004: 14 claims2005: 17 claims2006: 16 claims2007: 10 claims2008: 13 claims2009: 7 claims2010: 1 claims2011: 81 claims2012: 17 claims2013: 10 claims2014: 120 claims2015: 9 claims2017: 2 claims2019: 9 claims2020: 20 claims2021: 8 claims2022: 1 claims2023: 32 claims2024: 3 claims2025: 2 claims2026: 4 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

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

Federal disasters

19 federal disaster declarations since 1965, 4 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe StormsJun 29, 2012
Hurricane Katrina EvacuationAug 29, 2005
Severe Winter Storms, Flooding, And MudslidesDec 22, 2004
Severe Storms And FloodingAug 27, 2004
Severe Storms And FloodingMay 18, 2004
Power OutageAug 14, 2003
Severe Storms And TornadoesNov 10, 2002
Severe Storms And FloodingAug 7, 1995

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

Recorded flood events

81 since 1996: 62 flash floods, 17 river or area floods and 2 coastal floods or surges.

EventDateDamage
Flash FloodMay 22, 2024—
FloodAug 24, 2023—
Flash FloodAug 23, 2023$500,000
Flash FloodAug 23, 2023$200,000
Flash FloodAug 23, 2023$3.0M
Flash FloodAug 21, 2022$800,000
Flash FloodJul 12, 2021—
FloodMay 9, 2021—

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

From the storm reports

Flash Flood · May 22, 2024. At the surface, an occluded low moved north-northeastward from near western Lake Superior to northern ON, west of James Bay, during the late morning of the 22nd through the wee hours of the morning of the 23rd. Simultaneously, the trailing cold front advanced generally eastward from southeastern Lower MI to the western NY to northeast OH corridor, just east and southeast of Lake Erie. Clusters and lines of multice…

Flood · Aug 24, 2023. An anomalously-warm and moist air mass was in place across much of the Central Plains and Midwest, resulting in strong to perhaps extreme instability in addition to tropical-like precipitable water values exceeding 2.0 inches. The Lower Great Lakes region, specifically northern Ohio and Northwest Pennsylvania found itself on the eastern edge of this heat dome. Strong northwest flow aloft persisted along the periph…

Flash Flood · Aug 23, 2023. An anomalously-warm and moist air mass was in place across much of the Central Plains and Midwest, resulting in strong to perhaps extreme instability in addition to tropical-like precipitable water values exceeding 2.0 inches. The Lower Great Lakes region, specifically northern Ohio and Northwest Pennsylvania found itself on the eastern edge of this heat dome. Strong northwest flow aloft persisted along the periph…

Flash Flood · Aug 21, 2022. Weak surface low pressure slowly moved across northwest Ohio over the southern shore of Lake Erie in north central Ohio during the afternoon and evening hours of August 21st. A warm front was oriented from west to east across the area just south of the lakeshore, while a trailing cold front slowly advanced eastward behind the low. In the warm sector, MUCAPE values of 1000-1500 j/kg, weak deep layer shear, and prec…

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 Lorain County

If a building in Lorain 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.