City vs city
Boulder Canyon vs Rapid City, SD
Boulder Canyon currently scores 5 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
Boulder Canyon: 47/100 · Rapid City: 42/100
Boulder Canyon is 5 points higher.
Flood
Boulder Canyon: 47/100 · Rapid City: 49/100
Rapid City is 2 points higher.
Boulder Canyon: FEMA NFHL flood zones: 2 features intersect this tile.
Rapid City: FEMA NFHL flood zones: 5 features intersect this tile.
Wind
Boulder Canyon: 19/100 · Rapid City: 20/100
Rapid City is 1 points higher.
Boulder Canyon: Wind exposure derived from ingested design wind / climatology tiles.
Rapid City: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Boulder Canyon: 26/100 · Rapid City: 24/100
Boulder Canyon is 2 points higher.
Boulder Canyon: Lightning exposure derived from ingested climatology tiles.
Rapid City: Lightning exposure derived from ingested climatology tiles.
Tornado
Boulder Canyon: 0/100 · Rapid City: 8/100
Rapid City is 8 points higher.
Boulder Canyon: Tornado risk derived from NOAA SPC historical reports.
Rapid City: Tornado risk derived from NOAA SPC historical reports.
Hail
Boulder Canyon: 100/100 · Rapid City: 100/100
No gap.
Boulder Canyon: Hail risk derived from NOAA SPC historical reports.
Rapid City: Hail risk derived from NOAA SPC historical reports.
Storm surge
Boulder Canyon: Unavailable · Rapid City: Unavailable
A score difference cannot be calculated without both sources.
Boulder Canyon: Storm surge model is not available for this location yet.
Rapid City: Storm surge model is not available for this location yet.
Wildfire
Boulder Canyon: 63/100 · Rapid City: 67/100
Rapid City is 4 points higher.
Boulder Canyon: Wildfire exposure derived from ingested fire potential tiles.
Rapid City: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Boulder Canyon: 28/100 · Rapid City: 29/100
Rapid City is 1 points higher.
Boulder Canyon: 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.