Blog · October 14, 2026 · Texas
Castro County Flood Zone Map, Texas: a practical guide
Flood zones are set by FEMA, and checking one near Dodd takes a few minutes.
Main page: Castro County, TX GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before an offer near Hart, pull up the Castro County flood zone map: a mapped flood zone changes insurance, building rules and resale. Covered here for Castro County: locating a parcel on FEMA's map, reading the zone codes, and pairing it with the Castro CAD interactive map.
Where the Castro County flood zone map lives
If you'd rather pan and zoom, use the National Flood Hazard Layer viewer, where zone shading sits over a photo base, for land near Nazareth included. Rural land near Dimmitt with no street number can still be found: zoom in from the nearest road and click the spot.
Opening the official parcel viewer
Your first stop is the Castro CAD interactive map; it maps every tax parcel around Nazareth and Hart. Without an address in hand, follow the nearest road on the aerial until the lines appear, then click inside the one you want, whether the land is near Nazareth or elsewhere in the county. For acreage around Dimmitt, copy the parcel ID from that panel; every office in the county will want it.
Reading A, AE and X
Near Easter, any A or V zone mark the Special Flood Hazard Area, meaning a 1% or greater chance of flooding each year. For a parcel near Summerfield, a shaded X area marks moderate flood hazard, between the 1% and 0.2% annual chance floods; unshaded X means minimal mapped risk.
Reading the legal description
Tracts outside towns near Nazareth are often described by metes and bounds, which trace the boundary call by call. Town lots near Easter refer to a recorded plat, making them easier to find. Write down the legal description for the tract near Frio before you request a deed or survey.
What the map can't tell you
Listed acreage is a tax-roll number; just a licensed surveyor sets the real boundary for a parcel near Dimmitt. For land near Nazareth, records update in batches, so a deed recorded last month can take weeks to appear.
Neighboring parcel maps
Castro County touches Deaf Smith County, Hale County, Lamb County, Parmer County, and Randall County; every one of them runs a separate parcel map. Acreage along the edge near Easter can show up across two assessors' files, so check the adjacent map as well. In and around Easter, our state page lists each bordering county map across Texas.
Field tips
The parcel map usually runs in a mobile browser, useful out on a road near Dimmitt, but coverage can be spotty out of town. A saved image of the lot near Dimmitt and its lines keeps working without signal.
Low spots and local drainage
Small streams around Frio may not have detailed mapping, so ask neighbors about past flooding. Marshy spots near Dimmitt can limit building too; check the National Wetlands Inventory mapper for a first look.
Recorded documents worth pulling
If you're looking near Frio, the map is an index, not the title: recorded deeds, subdivision plats and easements for parcels in the county are filed with the County Clerk. For a parcel near Dimmitt, use the book and page listed on the parcel record so staff can find the deed fast.
Castro County in a few facts
Dimmitt holds the county offices, which is where the courthouse records live. Other places on the map include Hart, Nazareth, Summerfield, and Dodd. Around 7,227 people live in Castro County (Census Bureau estimate, 2023) spread over some 894 square miles. Castro County was formed in 1891, so old deeds can run back a long way.
Which office to call
If the acreage or value on a parcel near Dimmitt looks off belong with the appraisal district, since that office keeps the assessment data. Questions about what you can build around Dodd go to planning, building or health offices, and the answer depends on jurisdiction.
Matching the zone to the lot lines
FEMA's map shows zones but not ownership, so check the Castro CAD interactive map too for the outline of the tract near Dimmitt.
What a flood zone means for a buyer
For a home near Summerfield, ask for an Elevation Certificate: it compares the building to the BFE. Building or adding on near Hart in a mapped zone often needs a floodplain permit; call the permitting office early.
A short flood checklist
For a parcel near Easter, request whether the home has flooded before closing; getting a quote early avoids surprises.
Questions about the Castro County flood zone map
How often are flood maps updated for land near Nazareth?
In most cases, zones near Dimmitt can shift when FEMA updates a panel, so look at the panel date.
What is a LOMA near Frio?
With a lot near Nazareth, a Letter of Map Amendment (LOMA) from FEMA can remove a structure on naturally high ground; it starts with an elevation survey.
Can I see flood zones on the Castro CAD interactive map in Castro County?
If you're looking near Dimmitt, some county viewers include a FEMA flood layer, though it can lag behind FEMA's current panels.
How can I tell if a house near Hart is in a flood zone?
For most people, FEMA's free map shows the zone for any spot near Easter; then confirm the parcel on the county viewer.
Who keeps deeds for property around Summerfield?
For property near Dodd, values are the appraisal district's job; recorded documents belong to the County Clerk.
Open the official Castro 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.