City vs city
Harrisburg vs Rapid City, SD
Harrisburg currently scores 14 points higher overall than Rapid City, 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
Harrisburg: 56/100 · Rapid City: 42/100
Harrisburg is 14 points higher.
Flood
Harrisburg: 84/100 · Rapid City: 49/100
Harrisburg is 35 points higher.
Harrisburg: FEMA NFHL flood zones: 9 features intersect this tile.
Rapid City: FEMA NFHL flood zones: 5 features intersect this tile.
Wind
Harrisburg: 20/100 · Rapid City: 20/100
No gap.
Harrisburg: Wind exposure derived from ingested design wind / climatology tiles.
Rapid City: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Harrisburg: 43/100 · Rapid City: 24/100
Harrisburg is 19 points higher.
Harrisburg: Lightning exposure derived from ingested climatology tiles.
Rapid City: Lightning exposure derived from ingested climatology tiles.
Tornado
Harrisburg: 69/100 · Rapid City: 8/100
Harrisburg is 61 points higher.
Harrisburg: Tornado risk derived from NOAA SPC historical reports.
Rapid City: Tornado risk derived from NOAA SPC historical reports.
Hail
Harrisburg: 100/100 · Rapid City: 100/100
No gap.
Harrisburg: Hail risk derived from NOAA SPC historical reports.
Rapid City: Hail risk derived from NOAA SPC historical reports.
Storm surge
Harrisburg: Unavailable · Rapid City: Unavailable
A score difference cannot be calculated without both sources.
Harrisburg: Storm surge model is not available for this location yet.
Rapid City: Storm surge model is not available for this location yet.
Wildfire
Harrisburg: 53/100 · Rapid City: 67/100
Rapid City is 14 points higher.
Harrisburg: Wildfire exposure derived from ingested fire potential tiles.
Rapid City: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Harrisburg: 21/100 · Rapid City: 29/100
Rapid City is 8 points higher.
Harrisburg: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Rapid City: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.