County · Flood Risk
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SFHA Coverage
~15%
Concentrated along Spring Creek and San Jacinto River corridors
Harvey Claims Filed
~18,000
Severe flooding in The Woodlands and along the San Jacinto River
Active Flood Gauges
25+
Monitored by San Jacinto River Authority and USGS
Primary Watersheds
San Jacinto River, Spring Creek, Lake Conroe
Lake Conroe releases compound downstream flooding risk
Municipalities
Conroe, The Woodlands, Willis, Magnolia, Shenandoah
Population nearly doubled since 2000
Infrastructure
MCFCD improvements
Montgomery County Flood Control District channel and detention upgrades
Yes, if your property falls within a FEMA Special Flood Hazard Area (zones AE, A) and you carry a federally backed mortgage. About 15% of Montgomery County is in high-risk zones, primarily along Spring Creek and the San Jacinto River. Annual NFIP premiums under Risk Rating 2.0 typically range from $500 to $2,800 based on elevation and structure type.
The Montgomery County Flood Control District has invested in channel widening along Spring Creek, new detention basins near The Woodlands, and improved stormwater conveyance systems. Lake Conroe dam release protocols were also revised after Harvey, when controlled releases compounded downstream San Jacinto River flooding. Multiple projects are completed or in progress as of 2026.
Yes. MAAPnext is incorporating updated rainfall models, high-resolution LiDAR, and post-Harvey hydrological data into new preliminary maps for Montgomery County. Properties near Spring Creek and the San Jacinto River may see zone expansions, while areas benefiting from completed detention projects could shift from AE to shaded X zones.
The Woodlands experienced widespread flooding along Spring Creek and its tributaries, with over 6,000 homes damaged. Areas downstream of Lake Conroe along the San Jacinto River also saw record flooding as the lake reached capacity and releases increased. Montgomery County recorded approximately 18,000 FEMA claims totaling an estimated $1.5 billion in damages.
Search your address on FloodMaps for a free instant lookup showing your official FEMA flood zone, ground elevation, and neighborhood elevation profile. For the complete picture including San Jacinto River flood modeling, Harvey damage records, subsidence data, and an AI-generated risk score, upgrade to a Premium Report starting at $29.
Montgomery County sits north of Houston along the San Jacinto River and Spring Creek corridors, encompassing The Woodlands, Conroe, Willis, Magnolia, and Shenandoah. Approximately 15% of the county lies within FEMA Special Flood Hazard Areas, with Zones AE and A concentrated along waterway corridors and downstream of Lake Conroe. As one of the fastest-growing counties in Texas, new development continues to alter drainage patterns, making property-level flood risk data essential for homebuyers and real estate professionals.
FloodMaps integrates FEMA National Flood Hazard Layer data with USGS 3DEP LiDAR elevation models, San Jacinto River Authority gauge readings, Hurricane Harvey damage records, and Montgomery County Flood Control District project data to deliver a comprehensive property-level flood risk assessment. Premium Reports include AI-analyzed risk scores, parcel elevation profiles, subsidence trends, and flood depth modeling specific to your address.
Whether you're buying a home in The Woodlands, evaluating lakefront property near Conroe, or advising clients on Montgomery County real estate, understanding the specific flood risk profile at the address level is critical — especially given the county's Harvey history and ongoing Lake Conroe release dynamics. Search your address on FloodMaps to get started.