FEMA flood zones · Missouri

Benton County, Missouri Flood Zone Map

38 flood insurance claims·$312,964 paid·2 federal flood & hurricane disasters

13% of Benton 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 Benton County, Missouri. 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 Benton County floods

Flash flooding from severe thunderstorms dominates the flood profile of Benton County, Missouri, accounting for the majority of local flood events and all recorded fatalities over the last 30 years. NOAA records document significant events during storms in May 2024 and June 2025, when approaching surface low pressure systems, frontal boundaries, and moist airmasses produced heavy rainfall rates, damaging winds, golf ball-sized hail, and subsequent flash flooding.

Federal Insurance and Mitigation Administration data shows that historical flood insurance claims are heavily concentrated in designated special flood hazard areas. Properties located in Zone A account for the vast majority of local claims, with 33 filed averaging a payout of $12,202 and a recorded average water depth of 24 inches. A minimal number of claims occurred in zones categorized as UNKNOWN or Zone X, with average payouts of $2,641 and $0, respectively, and average water depths of 2 inches or less.

Homeowners, real estate agents, and journalists should pay the most attention to properties situated in Zone A, where historical data demonstrates the highest frequency of claims, significant average water depths, and the greatest financial payouts.

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

Where the flood claims came from

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

33 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 21 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 1993, with 13 claims and $237,647 paid, the year of Severe Storms & Flooding.

1982: 4 claims1983: 2 claims1986: 4 claims1990: 1 claims1993: 13 claims1994: 6 claims2008: 4 claims2015: 2 claims2018: 1 claims2022: 1 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

31 NOAA storm reports from Benton County describe what happened, in the words of the forecasters who covered it. Read the Missouri flood stories →

Federal disasters

21 federal disaster declarations since 1973, 2 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms, Straight-line Winds, Tornadoes, And FloodingJul 29, 2023
Severe Storms, Tornadoes, And FloodingApr 29, 2019
Severe Storms, Tornadoes, Straight-line Winds, And FloodingMay 15, 2015
Severe Winter StormJan 31, 2011
Severe Winter Storm And SnowstormJan 31, 2011
Severe Winter StormJan 26, 2009
Severe Winter StormsDec 8, 2007
Severe Winter Storms And FloodingJan 12, 2007

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

Recorded flood events

129 since 1996: 94 flash floods and 35 river or area floods.

EventDateDamage
FloodJun 4, 2025—
Flash FloodMay 8, 2024—
Flash FloodAug 1, 2023$10,000
Flash FloodAug 1, 2023—
FloodMay 5, 2022—
Flash FloodAug 4, 2022—
FloodMar 12, 2021—
FloodJul 30, 2020—

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

From the storm reports

Flood · Jun 4, 2025. A very moist airmass led to the development of thunderstorms with heavy rainfall rates during the morning and afternoon of June 4th. Significant flash flooding occurred in and around the city of Marshfield. Additional heavy rainfall caused flooding into the evening and overnight hours with some areas picking up two day totals of 3-5 inches.

Flash Flood · May 8, 2024. Two rounds of severe thunderstorms occurred on May 8, 2024. The first round occurred during the morning and early afternoon hours as a surface low pressure system approached the area from the southwest, pushing a strong frontal boundary and shortwave energy/lift into the region. For this round, thunderstorms were more elevated in nature, producing hail up to golf ball size, damaging winds, and flash flooding due t…

Flash Flood · Aug 1, 2023. Thunderstorms which developed across northwestern Missouri moved south and east across central Missouri during the evening of the first and into the overnight hours. Storms began to train across the region producing rainfall amount from 2 to 4 inches with a few local readings as much as 6 inches. This rainfall produced flooding across the region along with isolated wind damage to trees and power lines.

Flood · May 5, 2022. A stalled front from the storm a system on May 2-3 moved northward back into the Ozarks as a warm front as a strong upper level low over southern Colorado moved eastward into the southern Plains. This led to another several rounds of widespread heavy rainfall that occurred from the late morning of the 4th to the early morning of the 6th, when the surface low exited the area. Widespread accumulations of two to five…

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 Benton County

If a building in Benton 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.