About FloodMaps
FloodMaps was built on a simple idea: homeowners, buyers, and real estate professionals deserve better flood risk data than what's available today. Traditional FEMA flood maps are updated infrequently and show risk at a zone level — they can't tell you whether your specific property sits three feet above or three feet below the nearest flood channel. We can.
Why FloodMaps Exists
Houston is one of the most flood-prone metro areas in the United States. Between Tropical Storm Allison, Hurricane Harvey, and the recurring storms that hit the Gulf Coast, billions of dollars in property damage have been caused by flooding — often in areas that were not designated as high-risk by FEMA.
The problem isn't that FEMA data is wrong. It's that it's incomplete. A flood zone boundary doesn't account for micro-elevation differences, new upstream development that changes drainage patterns, or the fact that your street flooded three times in the last decade even though the map says you're in Zone X.
FloodMaps bridges that gap by combining official government data with live monitoring, high-resolution elevation models, and AI analysis to give you a property-specific picture of your actual flood risk.
How It Works
We pull directly from the National Flood Hazard Layer to show you the official FEMA designation for any property — Special Flood Hazard Areas, moderate-risk zones, and everything in between.
Real-time Houston 311 flood and drainage reports mapped around your property give you a live picture of neighborhood flooding patterns, open cases, and recurring problem areas.
High-resolution USGS 3DEP elevation data lets us calculate your property's actual ground elevation relative to nearby flood channels — a critical factor that flat FEMA maps miss.
Our AI engine synthesizes every data layer into a single, plain-language risk assessment for your specific address — not a generic zone-level summary.
Our Data Sources
Every FloodMaps report is generated from authoritative, publicly available data sources. We don't guess — we query.
National Flood Hazard Layer with official FEMA flood zone boundaries.
Draft and in-review FEMA flood-zone updates used to surface preliminary future flood-zone changes when available.
City of Houston flood and drainage reports near the property.
High-resolution LiDAR elevation models from the 3D Elevation Program.
Live and historical USGS NWIS stream-gauge observations used for flood-stage and water-level context.
Bayou, channel, stormwater infrastructure, and detention-basin context from Harris County Flood Control District.
Property and parcel records from Harris County Appraisal District.
Rainfall-frequency statistics from NOAA used to contextualize precipitation intensity and storm recurrence.
Subsidence and groundwater-related monitoring data from the Harris-Galveston Subsidence District.
Public FEMA disaster-assistance and Harvey-related historical claim datasets used for flood-history context.
Modeled Hurricane Harvey damage data used to estimate historical flood-impact severity around a property.
Check your flood risk
Search any Houston address for a free flood analysis report