FEMA flood zones · Mississippi

Washington County, Mississippi Flood Zone Map

1,955 flood insurance claims·$36.2M paid·8 federal flood & hurricane disasters

58% of Washington County’s area is in FEMA’s high-risk flood zones, and another 39% 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 Washington County, Mississippi. 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 Washington County floods

Flash flooding from severe storms dominates the flood character of Washington County, accounting for 59 of the 71 recorded flood events over the last 30 years, alongside river floods, hurricanes, and tropical systems. Recent severe weather events, such as those on April 5, 2025, and March 25, 2024, brought heavy rainfall that produced widespread flash flooding and flooding alongside damaging winds, hail, and tornadoes.

Flood insurance claims data from FEMA indicates that homeowners and real estate agents in Zone A should pay the most attention to flood risk, as this zone has accumulated 1,552 claims with an average payout of $24,070 and an average recorded water depth of 11 inches. Properties located in unshaded Zone X, shaded Zone X, and areas with unknown zones have also experienced historical claims, with average recorded water depths ranging from 3 to 5 inches and average payouts between $9,051 and $26,812.

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

Where the flood claims came from

11% of Washington County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

1,739 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 2008, with 421 claims and $9.2M paid, the year of Severe Storms and Flooding and Hurricane Gustav.

1978: 5 claims1979: 105 claims1980: 1 claims1981: 1 claims1982: 16 claims1983: 131 claims1984: 78 claims1985: 6 claims1986: 3 claims1987: 2 claims1988: 1 claims1989: 9 claims1990: 8 claims1991: 176 claims1992: 1 claims1993: 6 claims1994: 61 claims1995: 92 claims1996: 9 claims1997: 100 claims1998: 34 claims1999: 15 claims2000: 14 claims2001: 24 claims2002: 45 claims2003: 11 claims2004: 12 claims2005: 22 claims2006: 4 claims2007: 2 claims2008: 421 claims2009: 30 claims2010: 4 claims2011: 117 claims2012: 6 claims2013: 10 claims2014: 6 claims2015: 3 claims2016: 197 claims2017: 5 claims2018: 35 claims2019: 96 claims2020: 20 claims2021: 3 claims2022: 1 claims2023: 2 claims2024: 1 claims2025: 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

40 NOAA storm reports from Washington County describe what happened, in the words of the forecasters who covered it. Read the Mississippi flood stories →

Federal disasters

30 federal disaster declarations since 1971, 8 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter StormJan 23, 2026
Severe Storms, Straight-line Winds, Tornadoes, And FloodingMar 14, 2025
Severe Storms, Straight-line Winds, And TornadoesMar 24, 2023
Hurricane IdaAug 28, 2021
Severe Storms, Tornadoes, Straight-line Winds, And FloodingJan 10, 2020
Severe Storms, Straight-line Winds, Tornadoes, And FloodingFeb 22, 2019
Severe Storms And FloodingMar 9, 2016
FloodingMay 3, 2011

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

Recorded flood events

71 since 1996: 59 flash floods and 6 river or area floods.

EventDateDamage
Flash FloodApr 5, 2025$100,000
Flash FloodMar 25, 2024$5,000
FloodMar 25, 2024$10,000
FloodJan 24, 2024$2,000
Flash FloodDec 13, 2022$30,000
Tropical DepressionAug 30, 2021$25,000
Tropical StormAug 27, 2020$20,000
Flash FloodSep 23, 2020$3,000

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

From the storm reports

Flash Flood · Apr 5, 2025. On the evening of April 5th into the morning of April 6th, strong to severe storms produced tornadoes, damaging winds and flash flooding.

Flash Flood · Mar 25, 2024. As a low pressure system moved across the country, strong to severe thunderstorms developed and moved across portions of Mississippi. These storms produced damaging wind gusts, hail, flooding rainfall, and a tornado.

Flood · Mar 25, 2024. As a low pressure system moved across the country, strong to severe thunderstorms developed and moved across portions of Mississippi. These storms produced damaging wind gusts, hail, flooding rainfall, and a tornado.

Flood · Jan 24, 2024. With an upper-level trough of low pressure situated over Central Plains and a very moist air mass extending north through the Mississippi River Valley, training showers and thunderstorms produced heavy rain and flooding over parts of Mississippi.

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 Washington County

If a building in Washington 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.