City vs city
Harrisburg vs Rapid City, SD
Harrisburg currently scores 13 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 is a current EPA AirNow signal; 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: 43/100
Harrisburg is 13 points higher.
Flood
Harrisburg: 84/100 · Rapid City: 53/100
Harrisburg is 31 points higher.
Harrisburg: FEMA NFHL flood zones: 9 features intersect this tile.
Rapid City: FEMA NFHL flood zones: 8 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: 23/100
Harrisburg is 20 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: 23/100
Harrisburg is 46 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: 57/100
Rapid City is 4 points higher.
Harrisburg: Wildfire exposure derived from ingested fire potential tiles.
Rapid City: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Harrisburg: 21/100 · Rapid City: 28/100
Rapid City is 7 points higher.
Harrisburg: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Rapid City: Air quality signal derived from the latest EPA AirNow combined AQI grid.