Enter any address in Delaware County, Ohio to see its FEMA flood zone
Flood events from heavy rainfall, often from scattered thunderstorms, are the dominant flood character in Delaware County, OH. Over the last 30 years, NOAA Storm Events data shows 52 flood events and 18 flash flood events. Recent examples include heavy rain from scattered thunderstorms on July 1, 2021, and locally heavy rain produced by the remnants of Hurricane Ida on August 31, 2021.
National Flood Insurance Program (NFIP) claims data indicates that properties in Zone A have experienced the most claims, with an average payout of $14,217 and an average water depth of 5.6 feet. Properties in Zone X also show a significant number of claims, with an average payout of $4,569 and an average water depth of 3.8 feet. While fewer claims have been filed in Zone X_SHADED, the average payout for these properties is considerably higher at $32,050. Homeowners in Zone A, and those in Zone X or X_SHADED, should pay particular attention to their flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
3 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Delaware County, Ohio has recorded 70 flood-related events since 1996 according to NOAA's Storm Events Database, including 18 flash floods and 52 river or area floods. The county has received 15 federal disaster declarations. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1965–2024)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Tornadoes | Tornado | Mar 14, 2024 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms | Severe Storm | Jun 29, 2012 |
| Severe Wind Storm Associated With Tropical Depression Ike | Severe Storm | Sep 14, 2008 |
| Record Snow And Near Record Snow | Snowstorm | Mar 7, 2008 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
| Severe Winter Storms, Flooding, And Mudslides | Severe Storm | Dec 22, 2004 |
| Snow | Snowstorm | Dec 22, 2004 |
| Severe Storms And Flooding | Severe Storm | Aug 27, 2004 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Aug 31, 2021 | 0.00K |
| Flood | Jul 11, 2021 | 0.00K |
| Flood | Jul 1, 2021 | 0.00K |
| Flash Flood | Mar 28, 2020 | 0.00K |
| Flood | May 19, 2020 | 0.00K |
| Flash Flood | May 19, 2020 | 5.00K |
| Flood | Sep 7, 2020 | 0.00K |
| Flood | Jun 19, 2019 | 0.00K |
| Flood | Feb 7, 2019 | 0.00K |
| Flood | Jul 3, 2019 | 0.00K |
Flood — Aug 31, 2021
Showers and embedded thunderstorms associated with the remnants of Hurricane Ida produced locally heavy rain through the day.
Flood — Jul 11, 2021
Scattered showers and thunderstorms developed during the afternoon hours ahead of an approaching upper level disturbance.
Flood — Jul 1, 2021
Scattered thunderstorms associated with an upper level disturbance produced locally heavy rainfall during the early morning hours.
Flash Flood — Mar 28, 2020
Thunderstorms developed during the evening hours ahead of a cold front moving through the Ohio Valley. The thunderstorms continued into the early morning hours of the 29th.
Flood — May 19, 2020
A slow moving upper level low pressure system produced showers and thunderstorms across the Ohio Valley.
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Delaware County, Ohio:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Delaware County, Ohio that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.