Flood risk guide
Flood zones & flood insurance
How to read FEMA flood maps, look up a North Texas property, compare NFIP and private flood insurance, and use elevation certificates before you buy.
Flood risk
Flood zones & flood insurance in North Texas
North Texas creeks, rivers and lakes can rise fast after heavy rain, and flood risk doesn't stop at the edge of a mapped flood zone. Before you buy, look up the property's FEMA flood zone, ask the seller what they know, and price insurance during your option period. This guide shows where to look and what the terms mean.
Reading FEMA flood zones
| Zone | What FEMA means |
|---|---|
| A, AE, AH, AO | Special Flood Hazard Area (high risk): at least a 1% chance of flooding in any year, the "100-year" floodplain. That works out to about a 26% chance over a 30-year mortgage. AE zones show a Base Flood Elevation. |
| Floodway | The channel and nearby land that must stay open to carry floodwater. Building there is tightly restricted. |
| X (shaded) | Moderate risk, between the 1% and 0.2% annual-chance ("500-year") floodplains. |
| X (unshaded) | Minimal risk, outside the 0.2% annual-chance floodplain. Minimal isn't zero. |
Lenders must require flood insurance on federally backed or regulated loans for buildings in a Special Flood Hazard Area. Outside those zones, it's optional but often inexpensive. Definitions: FloodSmart: What is my flood risk? and FEMA flood zone glossary.
How to look up a property
- FEMA Flood Map Service CenterEnter the address on the FEMA MSC to see the official effective flood map (FIRM) and any Letters of Map Change.
- The flood layer on this siteEvery community page has a map. Use the layer button to turn on "FEMA flood hazard zones" and zoom in to street level. It draws from FEMA's National Flood Hazard Layer and is for reference only. Try Weatherford, Granbury or Graford.
- Texas Water Development Board toolsThe Texas Flood Information Viewer shows real-time river gauges and lake levels and lets you sign up for alerts. The Interactive State Flood Plan Viewer shows planning-level flood risk data from the 2024 State Flood Plan. It isn't a regulatory map, but it can flag areas worth asking about.
- The survey and the local floodplain administratorYour survey should note the flood zone. The city or county floodplain administrator can tell you about local rules, permits and any elevation certificate on file.
NFIP vs. private flood insurance
Most homeowners policies don't cover flood damage. That's a separate policy, from the National Flood Insurance Program (NFIP) or a private insurer.
| NFIP | Private flood | |
|---|---|---|
| Building coverage (single-family) | Up to $250,000 | Varies; some policies offer higher limits |
| Contents coverage | Up to $100,000 | Varies |
| Waiting period | Generally 30 days, with exceptions such as buying the policy when you take out or change a mortgage | Set by the insurer |
| Where to buy | Through an insurance agent who writes NFIP policies | Through agents or insurers offering private flood |
Sources: FloodSmart: Buy a policy and the Texas Department of Insurance. The Office of Public Insurance Counsel flood shopping guide compares options. If you use a private policy to meet a lender requirement, confirm the lender accepts it before closing. Because of the waiting period, get quotes early in your option period.
Elevation certificates
A FEMA Elevation Certificate documents a building's elevations compared with the flood risk on the map. It's used for floodplain compliance and insurance rating, and it can support a Letter of Map Amendment (LOMA) request. When surveyed elevations are needed, it's completed by a licensed land surveyor, engineer or architect.
- Ask the seller whether they have one. A completed certificate doesn't expire unless the building changes.
- Ask the city or county floodplain administrator whether one is on file.
- If not, a surveyor can prepare one. Ask your insurance agent whether it would help your quote.
What Texas sellers disclose
Texas Property Code §5.008 requires the seller's disclosure notice for most residential sales to address flood topics the seller knows about. These include whether the property has flood insurance, has flooded from a reservoir release or natural flooding, is in a 100-year or 500-year floodplain, floodway, flood pool or reservoir, and whether the seller has filed a flood claim or received FEMA or SBA flood assistance. Read those answers closely and ask follow-up questions.
Lake and creek property
Lakefront lots carry their own questions: the reservoir's flood pool, how high the water has risen in the past, and who controls the shoreline. At Possum Kingdom, the 1,000-foot contour marks the deeded line between private land and the lake. See the Possum Kingdom buying guide and the lake property page. On acreage, look at low-water crossings and creek frontage. Ask whether the road in has ever flooded.
FAQ
Flood zone questions
How do I find out if a house is in a flood zone?
Enter the address on the FEMA Flood Map Service Center, check the flood zone noted on the survey, and turn on the FEMA flood layer on the map on any community page of this site. The local floodplain administrator can confirm the zone and local rules.
Do I need flood insurance if I'm not in a flood zone?
A lender generally won't require it outside a Special Flood Hazard Area, but floods happen outside mapped zones too, and homeowners policies usually exclude flood. Many buyers get a quote anyway; policies in moderate- and low-risk zones are often less expensive.
What does Zone AE mean?
Zone AE is a high-risk Special Flood Hazard Area with at least a 1% annual chance of flooding, about a 26% chance over a 30-year mortgage. FEMA has determined a Base Flood Elevation for AE zones, and lenders require flood insurance for federally backed loans on buildings there.
What's the difference between NFIP and private flood insurance?
NFIP policies are backed by FEMA and cover up to $250,000 for a single-family building and $100,000 for contents, generally with a 30-day waiting period. Private policies are set by each insurer and may offer different limits and waiting periods. Confirm your lender accepts a private policy before relying on it.
What is an elevation certificate and do I need one?
It's a FEMA form showing a building's elevations compared with the mapped flood risk, prepared by a licensed surveyor, engineer or architect when surveyed elevations are needed. It can affect insurance pricing and support a map amendment request. Ask the seller and the floodplain administrator whether one exists.
Is there a waiting period for flood insurance?
NFIP policies generally take effect 30 days after purchase. Exceptions include buying the policy in connection with making, increasing, extending or renewing a mortgage. Private policies set their own waiting periods, so get quotes early in your option period.
This content is general information, not legal or insurance advice. Flood maps, programs and rules change. Confirm details with FEMA, your local floodplain administrator and a licensed insurance agent.
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