FEMA flood zones · Texas

Terrell County, Texas Flood Zone Map

3 flood insurance claims·$5,159 paid·2 federal flood & hurricane disasters

Less than 1% of Terrell 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 Terrell County, Texas. 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 Terrell County floods

Flash flooding from severe thunderstorms and heavy rainfall dominates the flood risk profile of Terrell County. Over a 30-year period, the NOAA Storm Events Database recorded 35 flash flood events, alongside single occurrences of a flood and a tropical storm.

Recent weather patterns illustrate this hazard. On April 22, 2025, a western trough and a dryline triggered afternoon thunderstorms and severe supercells over the Stockton Plateau. Later, on September 2, 2022, abundant moisture combined with an upper trough to produce rain over already saturated soils, resulting in flash flooding.

Federal flood insurance records reflect limited historical claims data, consisting of three claims categorized under Zone UNKNOWN. These claims resulted in an average payout of $1,720 with an average recorded water depth of 0 inches. Homeowners and real estate agents with properties in unmapped or poorly defined hazard areas should pay the closest attention, as unassessed zones carry hidden risks during intense precipitation events.

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

In their words

3 NOAA storm reports from Terrell County describe what happened, in the words of the forecasters who covered it. Read the Texas flood stories →

Federal disasters

15 federal disaster declarations since 1965, 2 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms, Straight-line Winds, Tornadoes, And FloodingApr 26, 2024
Severe Winter StormFeb 11, 2021
Severe Winter StormsFeb 11, 2021
WildfiresApr 6, 2011
WildfiresMar 14, 2008
Extreme Wildfire ThreatNov 27, 2005
Hurricane RitaSep 23, 2005
Hurricane Katrina EvacuationAug 29, 2005

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

Recorded flood events

37 since 1996: 35 flash floods and 1 river or area floods.

EventDateDamage
Flash FloodApr 22, 2025—
Flash FloodMay 28, 2024—
Flash FloodSep 2, 2022$1,000
Flash FloodApr 13, 2017—
Flash FloodJun 27, 2016—
Flash FloodJul 4, 2010—
Flash FloodJun 28, 2008—
Flash FloodMay 25, 2007—

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

From the storm reports

Flash Flood · Apr 22, 2025. A broad trough across the western United States and a dryline across the Permian Basin and Stockton Plateau resulted in afternoon thunderstorms. Several severe right-moving supercells occurred over the Stockton Plateau, with left-moving supercells moving across western portions of the Permian Basin. In addition, a localized dry microburst resulted in intense wind gusts of 100 MPH or greater near Midland Internatio…

Flash Flood · May 28, 2024. A strong outflow boundary moved across the Permian Basin resulting in a dust storm with areas of significant visibility reduction. This outflow boundary would also aid in the development of afternoon severe thunderstorms across the Lower Trans Pecos and northeast Permian Basin.

Flash Flood · Sep 2, 2022. West Texas was on the western edge of an upper trough. Abundant moisture and lift were across the area. These conditions allowed for more rain to develop and move over already saturated soils which resulted in flash flooding.

Flash Flood · Apr 13, 2017. A southern stream trough approached the region from the west. Increasing low level moisture, strong upper level lift, instability, and wind shear ahead of the trough supported the development of thunderstorms with large hail across West Texas. The high moisture content of the atmosphere and slow storm motion resulted in heavy rain and flash flooding.

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 Terrell County

If a building in Terrell 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.