FEMA flood zones · Oklahoma

Tillman County, Oklahoma Flood Zone Map

5 flood insurance claims·$65,883 paid·5 federal flood & hurricane disasters

1% of Tillman 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 Tillman County, Oklahoma. 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 Tillman County floods

Flash flooding dominates the flood character of Tillman County, accounting for 23 of the 32 recorded flood events over the last 30 years, alongside 9 standard flood events.

Recent occurrences documented by NOAA include flash flood and flood events driven by slow-moving mesoscale convective vortices and severe thunderstorm clusters in April and May 2025. These episodes demonstrate how persistent heavy rainfall and strong instability can rapidly create dangerous water accumulation across the region.

Residents located outside of mapped high-risk areas should still pay attention to local conditions, as FEMA records show 5 NFIP claims in Zone X resulting in an average payout of $13,177 with an average recorded water depth of 0 inches.

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

Flood claims, year by year

The worst year was 1997, with 1 claims and $24,658 paid.

1997: 1 claims2000: 1 claims2007: 1 claims2009: 1 claims2015: 1 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

16 NOAA storm reports from Tillman County describe what happened, in the words of the forecasters who covered it. Read the Oklahoma flood stories →

Federal disasters

36 federal disaster declarations since 1973, 5 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms, Straight-line Winds, Tornadoes, And FloodingApr 25, 2024
Severe Winter StormFeb 8, 2021
Severe Winter StormsFeb 8, 2021
Severe Winter StormOct 26, 2020
Severe Storms, Straight-line Winds, Tornadoes, And FloodingMay 7, 2019
Severe Storms, Tornadoes, Straight-line Winds, And FloodingApr 30, 2019
Severe Storms And FloodingJun 11, 2016
Severe Winter Storms And FloodingDec 26, 2015

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

Recorded flood events

32 since 1996: 23 flash floods and 9 river or area floods.

EventDateDamage
Flash FloodApr 30, 2025—
FloodApr 30, 2025—
Flash FloodApr 26, 2025—
Flash FloodApr 26, 2025$50,000
FloodMay 2, 2025—
Flash FloodMay 2, 2025—
Flash FloodApr 30, 2024—
FloodNov 8, 2024$10,000

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

From the storm reports

Flash Flood · Apr 30, 2025. Multiple rounds of severe convection and flooding occurred from the predawn hours of the 29th into morning hours of the 30th. The most significant round of severe thunderstorm activity occurred across portions of western-north Texas on the evening of the 29th, where intense supercell thunderstorms produced very large hail, damaging wind gusts and a pair of significant (EF-2+) tornadoes. Significant flash flooding…

Flood · Apr 30, 2025. Multiple rounds of severe convection and flooding occurred from the predawn hours of the 29th into morning hours of the 30th. The most significant round of severe thunderstorm activity occurred across portions of western-north Texas on the evening of the 29th, where intense supercell thunderstorms produced very large hail, damaging wind gusts and a pair of significant (EF-2+) tornadoes. Significant flash flooding…

Flash Flood · Apr 26, 2025. A slow-moving mesoscale convective vortex (MCV) produced severe weather and flash flooding during the morning and afternoon of the 26th. An initial complex of thunderstorms across southwestern Oklahoma and western-north Texas produced reports of thunderstorm wind damage and large hail, especially with a supercell thunderstorm that moved near the city of Lawton. Areas of persistent heavy rainfall also led to flash…

Flood · May 2, 2025. Numerous severe thunderstorms impacted portions of central and southern Oklahoma and western-north Texas early on the morning of the 2nd. Synoptically, this convective episode was driven by the approach of a weak shortwave trough rounding the periphery of a broader upper system across the Central and Northern Plains. Very strong elevated instability and sufficient wind shear promoted organized thunderstorm cluster…

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 Tillman County

If a building in Tillman 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.