FEMA flood zones · Tennessee

Benton County, Tennessee Flood Zone Map

19 flood insurance claims·$510,825 paid

15% 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, Tennessee. 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 driven by heavy rainfall and severe thunderstorms dominates the flood profile of Benton County, Tennessee. Over a thirty-year period recorded in the NOAA Storm Events Database, the county experienced 48 flash flood events compared to 4 general flood events. Recent activity includes heavy rain and training storms that produced flash flooding on April 5, 2025, as well as significant storm systems driven by Gulf moisture advection that caused flash flooding on February 15, 2025, and March 15, 2025.

Federal Emergency Management Agency National Flood Insurance Program records indicate that flood claims are heavily concentrated in designated hazard areas. Zone A properties account for the majority of claims with 13 filings, averaging $57,363 per payout and an average recorded water depth of 2 inches. Properties in Zone X accounted for 4 claims with an average payout of $16,666 and an average recorded water depth of 1 inch. An additional 2 claims were filed under an unknown zone, averaging $1,919 with an average recorded water depth of 1 inch.

Homeowners, real estate agents, and journalists should pay the closest attention to properties located within high-risk Zone A, where historical claims and average payout amounts are significantly higher than in other zones.

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

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 1 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 2010, with 8 claims and $291,341 paid, the year of Severe Storms, Flooding, Straight-line Winds, and Tornadoes.

1979: 1 claims1984: 1 claims1997: 1 claims2010: 8 claims2011: 1 claims2017: 1 claims2018: 1 claims2019: 5 claims1980199020002010

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

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

Federal disasters

22 federal disaster declarations since 1971.

DisasterBegan
Severe Winter StormJan 22, 2026
Severe Storms, Straight-line Winds, Tornadoes, And FloodingApr 2, 2025
Severe Storms, Straight-line Winds, And TornadoMar 1, 2023
Severe Storms, Straight-line Winds, And FloodingMay 3, 2020
Severe Storms, Tornadoes, Straight-line Winds, And FloodingMar 3, 2020
Severe Storm And Straight-line WindsOct 26, 2019
Severe Storms, Tornadoes, Straight-line Winds, And Associated FloodingApr 25, 2011
Severe Storms, Straight-line Winds, Tornadoes, And FloodingApr 19, 2011

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

Recorded flood events

52 since 1996: 48 flash floods and 4 river or area floods.

EventDateDamage
Flash FloodMar 15, 2025—
Flash FloodFeb 15, 2025—
Flash FloodApr 5, 2025—
Flash FloodMay 22, 2024—
Flash FloodJul 12, 2020—
Flash FloodSep 1, 2020$2,000
Flash FloodDec 16, 2019—
Flash FloodFeb 6, 2019—

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

From the storm reports

Flash Flood · Mar 15, 2025. An upper low over the Central Plains moved into the Upper Mississippi Valley during the evening hours of Friday, March 14, 2025. Increasing moisture advection ahead of an approaching cold front lifted dewpoints into the low to mid 60s. This coupled with increasing height falls and a mid-level 80 knot jet rotating around the main upper low supported severe thunderstorm development. Large looping hodographs, MLCAPE…

Flash Flood · Feb 15, 2025. An upper-level trough crossed the Four Corners region and dipped into northern Mexico on February 14, 2025. In response, deep southwesterly flow set up over the Lower Mississippi Valley and advected Gulf moisture poleward. Showers and thunderstorms blossomed across the region during the early morning hours on February 15, 2025. Meanwhile, a warm front quickly accelerated northward during the morning of February 15…

Flash Flood · Apr 5, 2025. The front eventually sagged south back into the Mid-South during the early morning hours of April 5th. Strong low-level moisture transport into the frontal zone resulted in heavy rain and training storms across northern sections of the Mid-South, mainly north of I-40. A bow echo developed along and just south of the slowly advancing front. This feature crossed the entire forecast area producing 13 tornadoes, inclu…

Flash Flood · May 22, 2024. A decaying MCS/MCV moved through the Mid-South during the overnight/early morning hours of May 22. A slow moving cold front was stretched over the Missouri Bootheel and moisture surged northward allowing for plentiful instability. This instability collided with remnant outflow boundaries from previous convection. Peak diurnal heating hours, moisture, and enough lift caused damaging winds, large hail, and flash flo…

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.