City vs city
Rock Hill vs Webster Groves, MO
Rock Hill currently scores 4 points higher overall than Webster Groves, with the largest gap in tornado.
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
Rock Hill: 43/100 · Webster Groves: 39/100
Rock Hill is 4 points higher.
Flood
Rock Hill: 42/100 · Webster Groves: 32/100
Rock Hill is 10 points higher.
Rock Hill: FEMA NFHL flood zones: 9 features intersect this tile.
Webster Groves: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Rock Hill: 16/100 · Webster Groves: 16/100
No gap.
Rock Hill: Wind exposure derived from ingested design wind / climatology tiles.
Webster Groves: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Rock Hill: 40/100 · Webster Groves: 41/100
Webster Groves is 1 points higher.
Rock Hill: Lightning exposure derived from ingested climatology tiles.
Webster Groves: Lightning exposure derived from ingested climatology tiles.
Tornado
Rock Hill: 38/100 · Webster Groves: 12/100
Rock Hill is 26 points higher.
Rock Hill: Tornado risk derived from NOAA SPC historical reports.
Webster Groves: Tornado risk derived from NOAA SPC historical reports.
Hail
Rock Hill: 100/100 · Webster Groves: 100/100
No gap.
Rock Hill: Hail risk derived from NOAA SPC historical reports.
Webster Groves: Hail risk derived from NOAA SPC historical reports.
Storm surge
Rock Hill: Unavailable · Webster Groves: Unavailable
A score difference cannot be calculated without both sources.
Rock Hill: Storm surge model is not available for this location yet.
Webster Groves: Storm surge model is not available for this location yet.
Wildfire
Rock Hill: 40/100 · Webster Groves: 44/100
Webster Groves is 4 points higher.
Rock Hill: Wildfire exposure derived from ingested fire potential tiles.
Webster Groves: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Rock Hill: 27/100 · Webster Groves: 27/100
No gap.
Rock Hill: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Webster Groves: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.