Neighborhood · Flood Risk
FloodMapsGet a detailed flood report of any Houston property
MAAPnext 2026 Status
Significant Expansion Expected
Barker Reservoir overflow and Cinco Ranch drainage zones being remapped
Primary FEMA Zones
Harvey Impact
Severe3,200+ FEMA claims filed in 2017
Primary Watershed
Buffalo Bayou
Barker Reservoir controls flow into Buffalo Bayou corridor
Est. Flood Insurance Cost
$1,500–$4,000
Based on estimated annual flood insurance premium
Drainage Infrastructure
Barker Reservoir and Cinco Ranch drainage
Army Corps reservoir operations and MUD-managed detention
Many do, and more will soon. A large portion of Katy properties near Barker Reservoir fall within FEMA Zones AE and A, requiring flood insurance for federally backed mortgages. MAAPnext maps are expected to significantly expand these zones. Annual premiums range $1,500–$4,000 depending on reservoir proximity and whether the property sits within the controlled-release pool footprint.
Yes, dramatically. MAAPnext 2026 maps are expected to significantly expand the Special Flood Hazard Area in Katy by incorporating Barker Reservoir overflow modeling and updated Cinco Ranch drainage data. Subdivisions that were Zone X during Harvey may be reclassified to Zone AE or A. This is one of the largest anticipated FEMA map expansions in west Harris County.
Severely. Katy recorded over 3,200 FEMA flood damage claims after Harvey in August 2017. Barker Reservoir reached record pool elevations, and the Army Corps conducted controlled releases into Buffalo Bayou that inundated neighborhoods for days. Cinco Ranch, Grand Lakes, and surrounding master-planned communities experienced 2–5 feet of standing water in thousands of homes.
Katy faces massive exposure from Barker Reservoir, one of two Army Corps flood-control reservoirs that exceeded design capacity during Harvey for the first time since 1948. Controlled releases flooded homes that had never been in a mapped flood zone. Rapid suburban development across Cinco Ranch and Grand Lakes continues adding impervious surface upstream of the reservoir system.
It depends on the property’s elevation and reservoir proximity. Katy’s flood risk is shifting rapidly under MAAPnext — homes that were Zone X before Harvey may soon be Zone AE. A FloodMaps report shows your exact elevation, Barker Reservoir overflow exposure, current and proposed FEMA zone, Harvey damage records, and AI-analyzed risk score.
Katy is a rapidly growing suburb in west Harris County facing some of the most significant FEMA flood map changes in the Houston metro area. Located near Barker Reservoir and along the upper Buffalo Bayou watershed, many properties previously outside any flood zone are being reclassified into Special Flood Hazard Areas under MAAPnext 2026 — making property-specific flood analysis critical for buyers in this high-demand market.
FloodMaps provides address-level flood risk reports for every property in Katy, combining FEMA flood zone designations, USGS 3DEP LiDAR elevation data, Barker Reservoir overflow modeling, Buffalo Bayou proximity analysis, Cinco Ranch drainage data, Hurricane Harvey damage records, subsidence monitoring, and live Houston 311 flood reports. Each report includes base flood elevation comparisons, freeboard calculations, and an AI-powered risk summary.
If you’re considering purchasing a home in Katy, evaluating your flood insurance requirements, or want to understand how Barker Reservoir overflow zones and MAAPnext reclassifications could affect your property, search your address for a comprehensive flood risk analysis — including reservoir proximity data that traditional FEMA flood maps have historically excluded.