What is the flood risk in 77002 Houston?

The flood hazard score for 77002 is 4.3/10 (MODERATE). This score is derived from FEMA flood zones, elevation data, and NFIP claim density.

Is 77002 in a hurricane zone?

Yes, Houston (77002) is in a hurricane-prone area. The hurricane hazard score is 3.8/10.

What natural disasters affect Houston, Texas?

The primary natural hazards for Houston (77002) are hurricane, flood, severe weather, wildfire. Calchis provides hazard scores for each peril using data from USGS, NOAA, and FEMA.

Houston, Texas 77002

Harris County · Texas

29.7543° N, 95.3632° W

Calchis Hazard Scores

◠Tornado

10.0/10EXTREME

Tornado events per 10,000 km2 per year, observed within ~83km (6.31)5.0 / 5.0

Manufactured housing density proxy2.0 / 3.0

Nocturnal tornado fraction (fatality multiplier)0.3 / 2.0

Model v2.5 · Hazard score

◉Hail

6.7/10HIGH

Hail events per 10,000 km2 per year, observed within ~83km (33.63)3.4 / 5.0

Regional roof vulnerability proxy (pre-ATTOM)2.5 / 5.0

Model v2.5 · Hazard score

≋Flood

4.3/10MODERATE

FEMA flood zone (X)0.3 / 4.0

Elevation above base flood level (estimated)1.0 / 3.0

Federal disaster declarations (44 in TX since 1953 · ~1 per 1.7yr)3.0 / 3.0

Model v2.5 · Hazard score

◎Hurricane

3.8/10LOW

CAT3+ landfall return period, Texas segment (10.7 yr, NOAA HRD 1950-2024)3.0 / 3.5

Distance to coastline0.9 / 3.0

Storm surge exposure (elevation + coastal proximity)0.0 / 3.5

Model v2.5 · Hazard score

●Winter Storm

3.0/10LOW

Winter events per forecast zone per year (0.8357)0.7 / 5.0

Ice storm and blizzard share of winter events (13.8%)2.3 / 5.0

Model v2.5 · Hazard score

△Wildfire

2.9/10LOW

Large fire frequency (Southern US region, 10,000+ acres)1.0 / 3.5

Wildland-Urban Interface exposure, measured development/wildland mixture (0.294)1.0 / 3.5

Regional vegetation/fuel load proxy (unsourced constant)0.5 / 3.0

Model v2.5 · Hazard score

⊕Earthquake

1.2/10LOW

Seismic source zone activity (Gutenberg-Richter)0.5 / 3.5

Proximity to mapped Quaternary faults0.3 / 3.0

Historical damage potential (Hazus W1 thresholds)2.9 / 3.5

Model v2.5 · Hazard score

Natural Hazards in Houston

Based on historical data and geographic analysis, the primary natural hazards affecting Houston, Texas (77002) are hurricane, flood, severe weather and wildfire. These scores are derived from federal and academic sources.

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