City vs city
Groton vs Rapid City, SD
Rapid City currently scores 12 points higher overall than Groton, with the largest gap in hail.
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
Groton: 30/100 · Rapid City: 42/100
Rapid City is 12 points higher.
Flood
Groton: 57/100 · Rapid City: 49/100
Groton is 8 points higher.
Groton: FEMA NFHL flood zones: 6 features intersect this tile.
Rapid City: FEMA NFHL flood zones: 5 features intersect this tile.
Wind
Groton: 20/100 · Rapid City: 20/100
No gap.
Groton: Wind exposure derived from ingested design wind / climatology tiles.
Rapid City: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Groton: 30/100 · Rapid City: 24/100
Groton is 6 points higher.
Groton: Lightning exposure derived from ingested climatology tiles.
Rapid City: Lightning exposure derived from ingested climatology tiles.
Tornado
Groton: 0/100 · Rapid City: 8/100
Rapid City is 8 points higher.
Groton: Tornado risk derived from NOAA SPC historical reports.
Rapid City: Tornado risk derived from NOAA SPC historical reports.
Hail
Groton: 29/100 · Rapid City: 100/100
Rapid City is 71 points higher.
Groton: Hail risk derived from NOAA SPC historical reports.
Rapid City: Hail risk derived from NOAA SPC historical reports.
Storm surge
Groton: Unavailable · Rapid City: Unavailable
A score difference cannot be calculated without both sources.
Groton: Storm surge model is not available for this location yet.
Rapid City: Storm surge model is not available for this location yet.
Wildfire
Groton: 41/100 · Rapid City: 67/100
Rapid City is 26 points higher.
Groton: Wildfire exposure derived from ingested fire potential tiles.
Rapid City: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Groton: 5/100 · Rapid City: 29/100
Rapid City is 24 points higher.
Groton: 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.