City vs city
Marion vs Rock Hill, SC
Marion currently scores 12 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
Marion: 54/100 · Rock Hill: 42/100
Marion is 12 points higher.
Flood
Marion: 42/100 · Rock Hill: 33/100
Marion is 9 points higher.
Marion: FEMA NFHL flood zones: 14 features intersect this tile.
Rock Hill: FEMA NFHL flood zones: 13 features intersect this tile.
Wind
Marion: 38/100 · Rock Hill: 19/100
Marion is 19 points higher.
Marion: Wind exposure derived from ingested design wind / climatology tiles.
Rock Hill: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Marion: 67/100 · Rock Hill: 46/100
Marion is 21 points higher.
Marion: Lightning exposure derived from ingested climatology tiles.
Rock Hill: Lightning exposure derived from ingested climatology tiles.
Tornado
Marion: 73/100 · Rock Hill: 19/100
Marion is 54 points higher.
Marion: Tornado risk derived from NOAA SPC historical reports.
Rock Hill: Tornado risk derived from NOAA SPC historical reports.
Hail
Marion: 65/100 · Rock Hill: 100/100
Rock Hill is 35 points higher.
Marion: Hail risk derived from NOAA SPC historical reports.
Rock Hill: Hail risk derived from NOAA SPC historical reports.
Storm surge
Marion: Unavailable · Rock Hill: Unavailable
A score difference cannot be calculated without both sources.
Marion: Storm surge model is not available for this location yet.
Rock Hill: Storm surge model is not available for this location yet.
Wildfire
Marion: 71/100 · Rock Hill: 52/100
Marion is 19 points higher.
Marion: Wildfire exposure derived from ingested fire potential tiles.
Rock Hill: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Marion: 25/100 · Rock Hill: 24/100
Marion is 1 points higher.
Marion: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
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.