Blog · October 14, 2026 · Texas
Reading the Dimmit County Flood Zone Map for a parcel
The zone on FEMA's map affects insurance, building and resale near Las Vegas.
Main page: Dimmit County, TX GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Before an offer near Asherton, check the Dimmit County flood zone map: the zone on that map shapes insurance, permits and resale. Covered here for Dimmit County: finding the address on FEMA's map, reading the zone codes, and pairing it with the Dimmit CAD interactive map.
The Dimmit County flood zone map: start here
If you'd rather pan and zoom, try the National Flood Hazard Layer viewer, which draws the zones over aerial imagery, which applies near Las Vegas as much as anywhere. Rural land near Catarina with no street number is still easy to locate: pan from the closest town and click inside the land.
Opening the official parcel viewer
In and around Brundage, the public parcel map for this area is the Dimmit CAD interactive map, and it opens in a browser with no account. For a parcel near Big Wells, enter a street address, an owner's name or a parcel number, and the viewer zooms to the match. For acreage around Carrizo Hill, copy the parcel ID while you have it open; each office in the county will want it.
Dimmit County in a few facts
Carrizo Springs is the county seat, which is where the courthouse records live. You'll also find Asherton, Big Wells, Brundage, and Carrizo Hill, each with its own cluster of lots. About 8,257 people live in Dimmit County (Census Bureau estimate, 2023) on about 1,329 square miles. The county dates to 1858, and some chains of title near Big Wells are long.
Limits of the parcel data
If you're looking near Las Vegas, listed acreage is an assessed number; only a licensed surveyor establishes the real boundary on the ground. On ground around Big Wells, owner names and values update on a schedule, so a deed recorded last month can take weeks to appear.
Field tips
The parcel map usually runs in a mobile browser, useful out on a road near Carrizo Hill, though signal can drop in rural spots. A printout of the tract near Catarina keeps working without signal.
Reading A, AE and X
In and around Las Vegas, zones beginning with A or V are Special Flood Hazard Areas, which FEMA defines as a 1% annual chance of flooding. For property near Las Vegas, a shaded X area is moderate risk, between the 1% and 0.2% annual chance floods; plain X, or C on older maps, is minimal risk.
A short flood checklist
For property near Carrizo Hill, request whether the home has flooded before closing; getting a quote early avoids surprises.
Next door to Dimmit County
Dimmit County touches Frio County, La Salle County, Maverick County, Webb County, and Zavala County; every one of them runs a separate parcel map. Acreage along the edge near Big Wells can show up in two county records, so check the adjacent map too. In and around Brundage, our state page links every bordering county map for Texas.
Lining it up with the parcel map
FEMA's map shows zones but not ownership, so check the Dimmit CAD interactive map too to confirm you have the right parcel near Brundage.
Water near Catarina
Creeks and ditches near Asherton aren't always studied in detail, so look for water marks and debris lines. Wetlands near Las Vegas can limit building even outside a flood zone; check the National Wetlands Inventory mapper for a first look.
Getting answers from the right desk
Questions about value or the owner field for land near Brundage belong with the appraisal district, the office behind the parcel record. Zoning, permits and septic questions near Catarina are for the local planning and health departments, and the answer depends on jurisdiction.
Legal descriptions in Texas
Tracts outside towns near Big Wells are often described by metes and bounds, listing bearings, distances and landmarks. Platted lots around Carrizo Hill usually use lot and block from a recorded plat instead, which is simpler to follow. Write down the legal description for the tract near Brundage for any title or survey request.
What a flood zone means for a buyer
Around Catarina, get the Elevation Certificate if one exists: it compares the building to the BFE. New construction in a floodplain near Las Vegas often needs a floodplain permit; ask the local floodplain administrator before you plan.
Quick answers
Where can I see the county flood zone map for free near Las Vegas?
Search the address near Asherton on FEMA's Flood Map Service Center, which takes a couple of minutes.
Do I need to worry about flooding in Zone X for land near Las Vegas?
For land near Big Wells, shaded X is moderate risk and unshaded X is minimal risk, and floods still happen outside high-risk zones.
Will my lender require flood insurance near Catarina?
For a building near Carrizo Springs in an A or V zone with a federally backed or regulated mortgage, it's generally required; outside those zones it's your call.
Is AE a high-risk flood zone near Catarina?
For land near Big Wells, both are high-risk zones, but only AE has a base flood elevation; unnumbered A zones don't list one.
What's the tax parcel number used for in Dimmit County?
It's the number the appraisal district uses to track a tract near Brundage; copy it before you call anyone.
Open the official Dimmit County, TX parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.