City vs city
Rock Hill vs Valley Falls, SC
Valley Falls currently scores 5 points higher overall than Rock Hill, 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: 42/100 · Valley Falls: 47/100
Valley Falls is 5 points higher.
Flood
Rock Hill: 33/100 · Valley Falls: 22/100
Rock Hill is 11 points higher.
Rock Hill: FEMA NFHL flood zones: 13 features intersect this tile.
Valley Falls: FEMA NFHL flood zones: 1 features intersect this tile.
Wind
Rock Hill: 19/100 · Valley Falls: 17/100
Rock Hill is 2 points higher.
Rock Hill: Wind exposure derived from ingested design wind / climatology tiles.
Valley Falls: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Rock Hill: 46/100 · Valley Falls: 45/100
Rock Hill is 1 points higher.
Rock Hill: Lightning exposure derived from ingested climatology tiles.
Valley Falls: Lightning exposure derived from ingested climatology tiles.
Tornado
Rock Hill: 19/100 · Valley Falls: 65/100
Valley Falls is 46 points higher.
Rock Hill: Tornado risk derived from NOAA SPC historical reports.
Valley Falls: Tornado risk derived from NOAA SPC historical reports.
Hail
Rock Hill: 100/100 · Valley Falls: 79/100
Rock Hill is 21 points higher.
Rock Hill: Hail risk derived from NOAA SPC historical reports.
Valley Falls: Hail risk derived from NOAA SPC historical reports.
Storm surge
Rock Hill: Unavailable · Valley Falls: Unavailable
A score difference cannot be calculated without both sources.
Rock Hill: Storm surge model is not available for this location yet.
Valley Falls: Storm surge model is not available for this location yet.
Wildfire
Rock Hill: 52/100 · Valley Falls: 66/100
Valley Falls is 14 points higher.
Rock Hill: Wildfire exposure derived from ingested fire potential tiles.
Valley Falls: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Rock Hill: 24/100 · Valley Falls: 36/100
Valley Falls is 12 points higher.
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.
Valley Falls: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.