Enter any address in Allendale County, South Carolina to see its FEMA flood zone
Flash flooding from thunderstorms is the most frequent flood event in Allendale County, SC, with 12 recorded instances in the last 30 years. Tropical Storms have also impacted the area, as seen with Helene in September 2024 and Idalia in August 2023.
While most flood insurance claims in Allendale County have occurred in Zone X, the average payout in this zone was over $42,000 with an average water depth of 1.0 ft. Claims in Zone A, though fewer, had an average payout of $0 and 0.0 ft water depth.
Residents in areas prone to flash flooding, particularly those near waterways or in lower-lying areas, should remain aware of flood risks. Properties located in Zone A, as well as those without a Base Flood Elevation (BFE) on file, may warrant particular attention.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
6 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Allendale County, South Carolina has recorded 19 flood-related events since 1996 according to NOAA's Storm Events Database, including 12 flash floods. The county has received 25 federal disaster declarations, 1 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1977–2026)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storm | Winter Storm | Jan 21, 2026 |
| Hurricane Helene | Tropical Storm | Sep 25, 2024 |
| Hurricane Debby | Tropical Storm | Aug 4, 2024 |
| Hurricane Idalia | Hurricane | Aug 29, 2023 |
| Hurricane Ian | Hurricane | Sep 25, 2022 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Hurricane Dorian | Hurricane | Aug 31, 2019 |
| Hurricane Florence | Hurricane | Sep 8, 2018 |
| Hurricane Irma | Hurricane | Sep 6, 2017 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Tropical Storm | Sep 26, 2024 | 936.00K |
| Tropical Storm | Aug 30, 2023 | — |
| Tropical Depression | Sep 11, 2017 | 0.00K |
| Tropical Storm | Sep 2, 2016 | — |
| Flash Flood | Jul 12, 2013 | 1.00K |
| Flash Flood | Jul 12, 2013 | 5.00K |
| Flash Flood | Jul 11, 2013 | 1.00K |
| Flash Flood | Jul 11, 2013 | 10.00K |
| Flash Flood | Jul 11, 2013 | 20.00K |
| Flash Flood | Jul 11, 2013 | 15.00K |
Tropical Storm — Sep 26, 2024
Helene first developed into a tropical storm in the northwest Caribbean Sea in the late morning of September 24, and strengthened into a hurricane near the Yucatan peninsula about 24 hours later. Helene continued to strengthen and became a major hurricane as it moved to the north-northeast across the eastern Gulf of Mexico. Helene made landfall in the Big Bend region of Florida in the late even...
Tropical Storm — Aug 30, 2023
Idalia first developed into a tropical depression across the western Caribbean Sea near the Yucatan Peninsula on August 26th before slowly gaining strength and becoming a tropical storm on August 27th. The storm then began to take a northward track the next day, passing the western tip of Cuba while gaining strength. On August 29th, Idalia was upgraded to a Category 1 hurricane early in the mor...
Tropical Depression — Sep 11, 2017
Irma first developed into a tropical storm on August 30th about 420 miles west of the Cabo Verde Islands, and within 24 hours strengthened into a hurricane. Irma continued to intensify and became a major hurricane over the eastern Atlantic on September 1st. After undergoing a brief period of weakening on September 2nd, Irma once again strengthened into a major hurricane on September 3rd and m...
Tropical Storm — Sep 2, 2016
Hermine developed as a Tropical Depression near the north coast of Cuba on August 28th. The depression then tracked westward into the central Gulf of Mexico and strengthened into a Tropical Storm. Hermine then tracked generally northeastward and strengthened into a Hurricane. According to the National Hurricane Center, Hermine made landfall as a Category 1 Hurricane at 1:30 am EDT on September ...
Flash Flood — Jul 12, 2013
Ongoing thunderstorms due to a stalled front over the region with precipitable water values near 2 inches continued throughout the night, producing heavy rain over a short period of time. In Allendale County, a dam break occurred on private pond, sending a massive amount of trees/debris over roadways.
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 Allendale County, South Carolina:
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 Allendale County, South Carolina 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.