Texas faces enormous flood risk from Gulf Coast hurricane storm surge, riverine flooding along the Brazos, Colorado, Trinity, Sabine, and Nueces rivers, and devastating urban flash flooding in Houston, Dallas-Fort Worth, and San Antonio. Hurricane Harvey in 2017 was the costliest tropical cyclone in U.S. history, dumping over 60 inches of rain on Houston and causing over $125 billion in damage. Harvey flooded over 300,000 structures and displaced more than 30,000 people. Houston is particularly vulnerable due to its flat terrain, clay soils, and rapid urbanization that has filled in wetlands and prairies that once absorbed rainfall. The city has experienced repeated catastrophic flooding including events in 2015, 2016, and 2017. The Brazos and Colorado rivers create extensive floodplains through central Texas. San Antonio sits along the San Antonio River and faces flash flood risk from the Edwards Plateau watershed. The Texas Hill Country is one of the flash flood-prone areas in the United States. The state has over 1,400 NFIP-participating communities. Texas leads the nation in flood-related fatalities and property damage. Climate change is expected to increase both hurricane intensity and extreme rainfall events across the state.
Texas Flood Zones
FEMA Flood Zone Lookup in Texas
Look up any address in Texas to find its FEMA flood zone designation, insurance requirements, and base flood elevation — sourced from the official National Flood Hazard Layer.
Zone AE along the Brazos, Colorado, Trinity, Sabine, and Nueces rivers; Zone VE along the Gulf coast from South Padre Island to Sabine Pass; Zone X (shaded) for moderate-risk areas throughout Houston, Dallas-Fort Worth, and San Antonio; Zone AH for ponding areas in Houston's bayou system.
Harris County, Jefferson County, Galveston County, Travis County, Tarrant County
NFIP premiums range from $600-$1,500 for standard-risk properties. Gulf coast VE zone properties can run $3,000-$8,000+ annually. Houston bayou-front properties face premiums of $1,500-$4,000. Risk Rating 2.0 has caused significant increases throughout coastal Texas.
Frequently Asked Questions — Texas
How bad was Hurricane Harvey in Houston?
Harvey was the costliest tropical cyclone in U.S. history, dumping over 60 inches of rain on Houston. Over 300,000 structures flooded, 30,000 people were displaced, and damage exceeded $125 billion. The flooding lasted for weeks in some areas.
Why does Houston flood so much?
Houston's flat terrain, clay soils, and rapid urbanization that has filled in wetlands and prairies create extreme flood vulnerability. The city's bayou system is easily overwhelmed by intense rainfall. Harvey demonstrated the catastrophic potential of stalled tropical systems.
Is flood insurance required in Texas?
Flood insurance is required for properties in designated Special Flood Hazard Areas with federally backed mortgages. Given Texas's extensive flood risk from hurricanes, rivers, and flash flooding, insurance is strongly recommended statewide. The state leads the nation in flood fatalities.
Disclaimer: FloodZoneCheck is a free research tool using public FEMA data, not an official Standard Flood Hazard Determination. Lenders require a certified determination from a licensed provider. Zone boundaries can cross a single parcel — confirm exact risk and insurance requirements with FEMA or your insurer before relying on this for a purchase or insurance decision.
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