Enter any address in King William County, Virginia to see its FEMA flood zone
Flash flooding from thunderstorms is the most frequent type of flood event recorded in King William County over the last 30 years, with 15 such events documented. Coastal flooding and general flooding events have also occurred. For example, residents experienced flash flooding on March 17, 2025, following scattered showers and thunderstorms. Coastal flooding impacted the area on October 12, 2025, due to strong northeast winds across the Chesapeake Bay.
National Flood Insurance Program (NFIP) data indicates that properties in Zone A have experienced the highest number of claims, with an average payout of $29,941 and an average water depth of 7.8 feet. Properties in Zone X have also seen claims, averaging $13,905 with a water depth of 0.6 feet. Homeowners in Zone A, and those in Zone X, should pay particular attention to flood risk.
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.
King William County, Virginia has recorded 25 flood-related events since 1996 according to NOAA's Storm Events Database, including 15 flash floods and 8 river or area 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 (1969–2026)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storm | Winter Storm | Jan 22, 2026 |
| Severe Winter Storm And Snowstorm | Severe Storm | Jan 2, 2022 |
| Severe Winter Storms | Severe Ice Storm | Feb 11, 2021 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Tropical Storm Michael | Hurricane | Oct 9, 2018 |
| Hurricane Florence | Hurricane | Sep 13, 2018 |
| Hurricane Sandy | Hurricane | Oct 26, 2012 |
| Hurricane Irene | Hurricane | Aug 26, 2011 |
| Tropical Depression Ernesto, Severe Storms And Flooding | Severe Storm | Aug 29, 2006 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jul 19, 2025 | 0.00K |
| Flash Flood | Mar 17, 2025 | 0.00K |
| Coastal Flood | Oct 12, 2025 | — |
| Flash Flood | Jul 12, 2025 | 0.00K |
| Flash Flood | Jul 9, 2025 | 0.00K |
| Flash Flood | Aug 19, 2024 | 0.00K |
| Flash Flood | Aug 17, 2024 | 0.00K |
| Flash Flood | Jul 16, 2023 | 0.00K |
| Flash Flood | Sep 10, 2023 | 0.00K |
| Flood | May 19, 2018 | 0.00K |
Flash Flood — Jul 19, 2025
A stationary front was anchored north of the area in Pennsylvania. Deep moisture was in place to the south of the front with precipitable water values near two inches. Strong surface heating resulted in robust instability with wind shear around 25 knots, allowing for deep, slow moving, convection capable of heavy rainfall and flash flooding during the afternoon and evening hours.
Flash Flood — Mar 17, 2025
Scattered showers and thunderstorms developed ahead of a slow-moving cold front on March 16 across southeast Virginia. These showers and storms trained over the same areas into early on March 17, allowing for heavy rain and instances of flash flooding across portions of southeast Virginia on March 16 and 17.
Coastal Flood — Oct 12, 2025
A coastal low formed off of the Southeast coast on October 11 and slowly tracked north into October 13 before moving offshore. Meanwhile, a strong 1035mb area of high pressure lingered over the Gulf of Saint Lawrence. This resulted in a prolonged period of strong northeast to north winds across the Chesapeake Bay and coastal waters, which allowed for widespread moderate to major coastal floodin...
Flash Flood — Jul 12, 2025
Scattered showers and storms developed across central and eastern Virginia on July 12 given an unstable air mass in place. These storms were slow-moving and produced heavy rain and flooding.
Flash Flood — Jul 9, 2025
A short wave trough aloft approached the Mid-Atlantic from the west on July 9. Strong thunderstorms formed during the afternoon and evening with gusty winds and heavy rainfall.
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 King William County, Virginia:
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 King William County, Virginia 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.