City vs city
Houston vs Rockwall, TX
Houston currently scores 3 points higher overall than Rockwall, with the largest gap in wind.
Use this comparison for relocation decisions, insurance shopping, and hazard-prioritized mitigation planning.
Hazard breakdown
Scores describe each city’s reference grid tile, not every property. A missing model is unavailable, not zero risk. Air quality uses an ingested EPA AirNow snapshot and may not reflect current conditions; other factors describe baseline exposure. The overall score blends different hazards and is not a probability of damage. Read the scoring methodology and sources.
Overall
Houston: 53/100 · Rockwall: 50/100
Houston is 3 points higher.
Flood
Houston: 39/100 · Rockwall: 46/100
Rockwall is 7 points higher.
Houston: FEMA NFHL flood zones: 16 features intersect this tile.
Rockwall: FEMA NFHL flood zones: 9 features intersect this tile.
Wind
Houston: 45/100 · Rockwall: 14/100
Houston is 31 points higher.
Houston: Wind exposure derived from ingested design wind / climatology tiles.
Rockwall: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Houston: 68/100 · Rockwall: 64/100
Houston is 4 points higher.
Houston: Lightning exposure derived from ingested climatology tiles.
Rockwall: Lightning exposure derived from ingested climatology tiles.
Tornado
Houston: 42/100 · Rockwall: 46/100
Rockwall is 4 points higher.
Houston: Tornado risk derived from NOAA SPC historical reports.
Rockwall: Tornado risk derived from NOAA SPC historical reports.
Hail
Houston: 76/100 · Rockwall: 100/100
Rockwall is 24 points higher.
Houston: Hail risk derived from NOAA SPC historical reports.
Rockwall: Hail risk derived from NOAA SPC historical reports.
Storm surge
Houston: 75/100 · Rockwall: Unavailable
A score difference cannot be calculated without both sources.
Houston: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Rockwall: Storm surge model is not available for this location yet.
Wildfire
Houston: 52/100 · Rockwall: 55/100
Rockwall is 3 points higher.
Houston: Wildfire exposure derived from ingested fire potential tiles.
Rockwall: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Houston: 30/100 · Rockwall: 28/100
Houston is 2 points higher.
Houston: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Rockwall: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.