FEMA flood zones · Ohio

Richland County, Ohio Flood Zone Map

329 flood insurance claims·$9.7M paid·1 federal flood & hurricane disasters

6% of Richland 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 Richland 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 Richland County floods

Flash flooding from summer thunderstorms dominates the flood risk profile in Richland County, Ohio, accounting for 39 events and 1 death over the last 30 years alongside 17 general flood events. Recent activity includes severe flash flooding driven by tropical-like precipitable water values in August 2023, as well as multicell thunderstorms along a stalled cold front in July 2021.

National Flood Insurance Program records show that flood impacts extend across multiple zones. Properties in high-risk Zone A have experienced the highest volume of claims at 212, with an average payout of $39,149 and an average recorded water depth of 12 inches. Meanwhile, properties in Zone X recorded 48 claims with an average payout of $35,768 and an average water depth of 12 inches, while Zone UNKNOWN accounted for 66 claims with an average payout of $9,155 and an average water depth of 3 inches.

Homeowners and real estate agents in high-risk Zone A and standard Zone X should pay the closest attention to flood preparedness, as properties in both zones have experienced average water depths of 12 inches during flood events.

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

Where the flood claims came from

1% of Richland County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

215 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 10 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 2007, with 102 claims and $5.7M paid, the year of Severe Storms, Flooding, and Tornadoes.

1978: 1 claims1979: 11 claims1981: 24 claims1984: 1 claims1987: 30 claims1989: 2 claims1990: 5 claims1991: 2 claims1994: 3 claims1996: 1 claims1998: 25 claims1999: 1 claims2002: 1 claims2003: 3 claims2004: 18 claims2005: 4 claims2006: 3 claims2007: 102 claims2010: 1 claims2011: 63 claims2013: 26 claims2019: 2 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

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

Federal disasters

18 federal disaster declarations since 1969, 1 of them floods, coastal storms or hurricanes.

DisasterBegan
TornadoesMar 14, 2024
Severe StormsJun 29, 2012
Record Snow And Near Record SnowMar 7, 2008
Severe Storms, Flooding, And TornadoesAug 20, 2007
Hurricane Katrina EvacuationAug 29, 2005
Severe Winter Storms, Flooding, And MudslidesDec 22, 2004
SnowDec 22, 2004
Severe Storms And FloodingAug 27, 2004

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

Recorded flood events

56 since 1996: 39 flash floods and 17 river or area floods.

EventDateDamage
Flash FloodAug 24, 2023—
Flash FloodAug 23, 2023—
Flash FloodJul 16, 2021—
FloodMay 9, 2021$2,000
FloodMay 18, 2020—
Flash FloodJul 21, 2019$20,000
Flash FloodJun 16, 2019$2,000
Flash FloodJun 16, 2019$80,000

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

From the storm reports

Flash 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 · Jul 16, 2021. A cold front moved southeastward from Lower Michigan to Lake Erie during the evening and overnight of the 15th and then stalled in vicinity of the southern lakeshore by daybreak. This was in response to one surface low moving northeastward from southwestern Quebec toward the mouth of the Saint Lawrence River, while another low moved along the front from eastern Iowa to near the Michigan/Indiana border. Ahead of th…

Flood · May 9, 2021. A surface area of low pressure tracked from the high plains crossing northern Ohio on Sunday May 9th. Widespread light to moderate rain developed Sunday morning and was ongoing through much of the day. Temperatures were in the upper 30s to low 40s, and some snowflakes mixed in midday. As the system moved east, rain turned to snow in the primary snowbelt with reports up to 2��� in northwest Pennsylvania and G…

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 Richland County

If a building in Richland 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.