Texas Flood Hazard Profile
Hazard Data · Model Version 2.5
Overview
Texas leads US states in flood-related fatalities and ranks among the highest for NFIP claims. The state's geography produces diverse flood hazards: Gulf Coast storm surge, Hill Country flash flooding, and riverine flooding along the Brazos, Colorado, and Trinity rivers. Harris County (Houston) alone has experienced multiple 500-year flood events since 2015.
In the Historical Record
Counted from the records this platform holds. A figure is shown only where the underlying dataset could be read.
County by County in Texas
What federal records show has happened in each county: storms, disaster declarations and flood insurance claims. The counties below have the longest NOAA storm records in Texas.
Notable Historical Events
Hazard Scoring Approach
Calchis computes a Calchis Hazard Score (0–10) for flood hazard at any US address. The score is composed of weighted sub-components derived from federal data sources and published research. All score components are transparent and returned in API responses.
These are hazard scores — physical intensity likelihood only. They do not include property exposure or vulnerability data. We never call a hazard score a risk score. See the full methodology for scoring details.
Analyze Your Address
Enter any Texas address to see location-specific flood hazard scoring with full methodology transparency.
Open Live Map — TexasData Sources
Related
Monitoring flood exposure in Texas?
This page is a state-level profile. Calchis scores individual addresses, tracks live flood events against your own locations, and alerts you when one approaches them.
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Calchis Hazard Score — derived from federal and academic sources listed above. Property exposure data not included. Not a substitute for professional actuarial assessment. Decision-support intelligence — not a primary alerting or dispatch system. Verify against official sources.