Buyer Guide/Flood Zones/By Address
Houston flood zones, by address.
Type a Greater Houston address. You’ll see its FEMA flood zone on the map, read live from FEMA’s current flood map.
FEMA flood zone for
A lookup, not an official flood zone determination. Your lender orders that. The zone is read at the spot Google places the address.
FEMA’s map service didn’t answer.
FEMA’s servers are sometimes slow. Try again in a moment, or open the address on FEMA’s own site.
Zoom in to see FEMA flood zones
The metro picture
How much of each Houston ZIP sits in a FEMA floodplain?
Across 252 Greater Houston ZIP codes, FEMA maps 26% of the land, on average, inside a Special Flood Hazard Area. 76 ZIPs have 30% or more. Those figures are land-area share, not a prediction that any ZIP floods, and not a ranking of places to live. Use them to ask better questions, not to rule ZIPs out.
Coastal and bayou-adjacent ZIPs tend to show a higher mapped share, which is what the FEMA layer would lead you to expect. The full table of all 252 is on Houston flood zones by ZIP code. For the metro outline of every ZIP, see the Houston ZIP code map. For MUD and tax coverage by ZIP, see Houston ZIP codes and property tax.
I’m Eddie Weir, a REALTOR® with REMAX Signature in Greater Houston, ABR and LUXE. Flood is the first question most buyers ask me about a house, and the honest answer lives at the address, not the ZIP code or the neighborhood name.
This page reads FEMA’s National Flood Hazard Layer every time you search. That is the digital version of FEMA’s official Flood Insurance Rate Maps. You get the zone at the address, the map panel and the date it took effect, any FEMA revision covering that spot, and whether newer FEMA maps are on the way.
People look for this a dozen ways: flood zones Houston, flood zones in Houston, flooding zones Houston, the Houston flood map. They all mean the same thing, the zone FEMA has assigned to one spot on the ground, and this page reads it one address at a time.
What it isn’t: an official flood zone determination. Your lender orders that. Use this to know the zone before you fall for the house, then confirm it the official way.
The map people search for
Where is the Houston flooded areas map?
The Houston flooded areas map is FEMA’s current flood map, shown on this page for one Greater Houston address at a time.
People look for a flooding map of Houston, a Houston map of flooded areas, a Houston TX flood map, or a map of Houston flood. Those searches all point at the same official layer: FEMA’s National Flood Hazard Layer. Type an address above and this page reads that layer at the point Google returns.
Houston flood map
A Houston flood map, in the sense lenders and the National Flood Insurance Program use, is FEMA’s Flood Insurance Rate Map. It shows the zone FEMA assigned to a spot: Special Flood Hazard Area (Zones A, AE, V), the 0.2% annual chance floodplain (shaded X), minimal mapped flood hazard (unshaded X), or Zone D where FEMA has not studied the hazard. It is not a picture of which houses took water in Harvey or Imelda.
What does a map of flooding in Houston actually show?
A map of flooding in Houston can mean two different things, and mixing them up is how buyers get a false yes or a false no. FEMA’s map is a regulatory flood zone. Harris County Flood Control District’s Flood Education Mapping Tool overlays modeled floodplains and, for Harris County, historical flooding from named storms. If you want the Houston area flooding map for one house, run both, then read the seller’s disclosure.
The ZIP-level picture — how much of each ZIP FEMA maps inside a Special Flood Hazard Area — is on Houston flood zones by ZIP code. Insurance, lending and the questions before an offer are in the Houston flood zone buyer guide.
Reading your result
What does my FEMA flood zone mean?
The zone letter drives two things: whether flood insurance is required on a federally backed mortgage, and how the NFIP prices a policy. Here is what you will see on Houston-area addresses.
| Zone | What FEMA means | Insurance, federally backed loan |
|---|---|---|
| A, AE, AH, AO | 1% annual chance flood, the 100-year floodplain. AE has a published base flood elevation. AE is the most common Special Flood Hazard Area zone in Houston. | Required |
| AE floodway | The channel and nearby land that carry floodwater. Stricter rules for building and remodeling. | Required |
| VE, V | Coastal high-hazard area with storm waves. Rare inside Houston, common along Galveston Bay. | Required |
| X, shaded | 0.2% annual chance flood, the 500-year floodplain. | Not required. Worth a quote. |
| X, unshaded | Minimal mapped flood hazard. | Not required. Worth a quote. |
| D | Possible flood hazard that FEMA hasn’t studied. | Not required by the map. |
The 1% language trips people up. It doesn’t mean once a century. It means a 1 in 100 chance every year, independent of last year, which works out to roughly 26 percent over a 30-year mortgage.
The source
Is this the official, current FEMA flood map?
It reads FEMA’s effective map, the one lenders and the National Flood Insurance Program use today, straight from FEMA’s servers on every search.
When FEMA revises a panel or approves a Letter of Map Revision, the change shows up here the next time you look. Nothing is cached on this site.
Two kinds of newer FEMA maps can exist, and your result says which applies. Preliminary maps are FEMA’s proposed update, open for appeal but not in effect. Pending maps have cleared appeals and carry the date they take effect. Until that date, the effective map rules.
Harris County’s new MAAPnext maps
FEMA posted draft flood maps for Harris County on February 10, 2026, built from the MAAPnext study with the Harris County Flood Control District: new lidar terrain data, higher rainfall rates and new models for every watershed. They are the first full update since the maps that took effect in 2007.
As of September 15, 2026, those maps are still a draft. Harris County says they are not final, are not open for appeal and can’t be used for insurance or regulatory decisions. FEMA expects to release preliminary maps after its federal review, and a formal appeal period follows. For a Harris County address, your result links to the draft map so you can see what may change.
Why a buyer should care now: once new maps take effect, they decide which homes must carry flood insurance. A house outside today’s Special Flood Hazard Area can land inside it, and some homes move out.
The gap
What doesn’t a flood zone tell you?
Of about 154,000 Harris County homes that flooded in Harvey, roughly 68 percent sat outside the 100-year floodplain, according to Harris County Flood Control District figures.
That isn’t a flaw in the map. FEMA’s zones model bayous and rivers leaving their banks. Three Houston realities sit outside that model:
Street drainage
When a stalled storm drops more rain than streets and storm sewers can carry, water collects well outside any mapped floodplain.
Older rainfall math
NOAA’s Atlas 14 raised Texas rainfall estimates in 2018. Many effective Houston panels are older than that, which is part of why MAAPnext exists.
Projects in progress
Bayou widening and detention basins change how water moves year to year. The map you read today may not reflect a project that just finished.
Flood zone versus flood history
A flood zone is FEMA’s regulatory designation for a point on the current map. Flood history is whether that house, or the street, took water in a named storm. The zone does not tell you the history, and the history does not rewrite the zone.
That is why a Zone X house can have flooded and a house inside a Special Flood Hazard Area can have stayed dry. FEMA’s zones model bayous and rivers leaving their banks. Street drainage, older rainfall math and unfinished projects sit outside that model, which is what the 154,000-home Harvey figure is measuring.
Tropical Storm Imelda, September 19, 2019, made the same split at a smaller scale. Harris County Flood Control District’s final Imelda report counted 3,990 flooded homes in Harris County. Of those, 2,479 (62%) sat outside the 1% annual chance floodplain. Those counts come from City of Houston and Harris County Engineering damage assessments plus paid FEMA claims as of November 5, 2019. 1,900 open FEMA claims were left out of the count.
Treat the zone as the floor of your diligence, not the ceiling.
Houston’s watersheds
Which Houston watersheds have the most flood claims?
By watershed, not by neighborhood name.
The bayous with the most repeat-loss history include Brays, White Oak, Buffalo (with the Addicks and Barker reservoir areas of west Houston and Katy), Cypress Creek, Greens, Sims, and Clear Creek with its tributaries south of the city.
Hundreds of thousands of Houstonians live in those watersheds, in homes that have never flooded. If a house you like sits in one, it means more diligence, not a pass. My Pearland guide covers which parts of Pearland sit high and which need a closer look, and Houston flood zones by ZIP code shows how much of each ZIP falls in a FEMA Special Flood Hazard Area. The Houston ZIP code map and Houston ZIP codes and property tax sit beside that table.
Before your option period ends
What should I check after the flood zone?
How to check a specific Houston address is three sources, in this order: FEMA, Harris County Flood Control District, and the seller’s disclosure.
- Pull the official FEMA map. Your result links straight to FEMA’s Map Service Center for the address.
- Open the Harris County Flood Control District map. The Flood Education Mapping Tool overlays watershed, modeled floodplain and historical flooding from named storms for Harris County addresses.
- Read the seller’s disclosure. Texas sellers must disclose known flooding, prior flood claims and floodplain status. My guide to the current disclosure form covers what changed.
- Ask for the elevation certificate. If there isn’t one, a surveyor can prepare it. It is often the biggest lever on the premium.
- Get two flood insurance quotes in writing, one through the NFIP and one private, before the option period ends.
- Ask about storm history. Harvey, Imelda and Beryl. Ask the seller directly, and talk to a neighbor.
- Walk the lot after a hard rain if you can. Standing water tells you what no map will.
- Look for mitigation. A raised slab, French drains, elevated mechanicals. Those show a previous owner planned for water.
Insurance
Do I need flood insurance in Houston?
If the house is in a Special Flood Hazard Area (Zones A, AE or V) and the mortgage is federally backed, yes. Everywhere else it is your call, and in Houston it is worth pricing.
Standard homeowners insurance doesn’t cover rising water. Under FEMA’s Risk Rating 2.0, an NFIP premium reflects the specific house, including elevation, distance to water and rebuild cost, not just the zone letter.
New NFIP policies usually take 30 days to start, unless you buy one with a home loan. Don’t wait for a storm in the Gulf. My Houston flood zone buyer guide goes deeper on insurance, lending and resale.
Common questions
Frequently asked questions
Is this an official flood zone determination?
No. It reads FEMA’s official map data, but the determination a lender relies on comes from a flood determination company using FEMA’s standard form. Use this page to know early, then confirm.
Why might my result differ from what my lender says?
Usually the zone line crosses the lot, the spot Google uses for the address isn’t where the house sits, or a Letter of Map Amendment applies to the structure. Zoom the map to the house, and ask your lender for the determination.
What does Zone X mean for a Houston home?
FEMA doesn’t map the spot inside the 1% annual chance floodplain. Shaded X is the 0.2% annual chance, or 500-year, floodplain. Unshaded X is minimal mapped hazard. Insurance isn’t required in either, and it is worth a quote.
Will the new Harris County maps change my zone?
They may. The MAAPnext draft adds Special Flood Hazard Area across much of the county and removes it in some neighborhoods. The draft isn’t in effect and can’t be used for insurance, so check the draft map link on your result to see which way your address moves.
Can flood history lower my property tax appraisal?
It can support a protest when the appraisal district’s value doesn’t reflect documented flooding. Keep your claim records, repair invoices and photos.
Does this work outside Houston?
For most U.S. addresses, yes. FEMA’s flood hazard layer covers most of the country. The notes on this page are written for Greater Houston.
Want a second read on an address?
Send it over. I’ll walk through the zone, the watershed, the storm history and what the insurance is likely to cost. Thirty minutes, no pitch.
Sources
Flood zones, map panels, revisions and preliminary and pending maps: FEMA National Flood Hazard Layer, queried live. Official panels: FEMA Flood Map Service Center. Draft Harris County maps: Harris County Flood Control District, MAAPnext. Harvey flooding outside the floodplain: Harris County Flood Control District figures, reported by the Houston Chronicle. Imelda house-flooding counts: Harris County Flood Control District, Tropical Storm Imelda Flood Report (final; claims as of November 5, 2019). ZIP floodplain shares: FEMA National Flood Hazard Layer intersected with U.S. Census 2020 ZCTA boundaries, as published on Houston flood zones by ZIP code. Harris County historical overlay: HCFCD Flood Education Mapping Tool. Rainfall: NOAA Atlas 14, Volume 11 (Texas, 2018). Insurance pricing: FEMA Risk Rating 2.0. Address search: Google Maps.
Flood zone results come from FEMA’s National Flood Hazard Layer at the point Google returns for the address. They are not an official flood zone determination, a prediction that any property will or won’t flood, or insurance advice. Confirm with FEMA’s Flood Map Service Center, the Harris County Flood Control District Flood Education Mapping Tool, the seller’s disclosure, an elevation certificate and an insurance quote. Last updated: September 19, 2026.
Eddie Weir, REALTOR® · REMAX Signature · License #560899 · Broker License #9003718
(346) 321-4422 · eddie@eddieweir.com
