City vs city
Bison vs Sioux Falls, SD
Sioux Falls currently scores 20 points higher overall than Bison, 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
Bison: 30/100 · Sioux Falls: 50/100
Sioux Falls is 20 points higher.
Flood
Bison: Unavailable · Sioux Falls: 52/100
A score difference cannot be calculated without both sources.
Bison: Flood model is not available for this location yet.
Sioux Falls: FEMA NFHL flood zones: 17 features intersect this tile.
Wind
Bison: 19/100 · Sioux Falls: 20/100
Sioux Falls is 1 points higher.
Bison: Wind exposure derived from ingested design wind / climatology tiles.
Sioux Falls: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Bison: 25/100 · Sioux Falls: 46/100
Sioux Falls is 21 points higher.
Bison: Lightning exposure derived from ingested climatology tiles.
Sioux Falls: Lightning exposure derived from ingested climatology tiles.
Tornado
Bison: 23/100 · Sioux Falls: 58/100
Sioux Falls is 35 points higher.
Bison: Tornado risk derived from NOAA SPC historical reports.
Sioux Falls: Tornado risk derived from NOAA SPC historical reports.
Hail
Bison: 86/100 · Sioux Falls: 100/100
Sioux Falls is 14 points higher.
Bison: Hail risk derived from NOAA SPC historical reports.
Sioux Falls: Hail risk derived from NOAA SPC historical reports.
Storm surge
Bison: Unavailable · Sioux Falls: Unavailable
A score difference cannot be calculated without both sources.
Bison: Storm surge model is not available for this location yet.
Sioux Falls: Storm surge model is not available for this location yet.
Wildfire
Bison: 41/100 · Sioux Falls: 51/100
Sioux Falls is 10 points higher.
Bison: Wildfire exposure derived from ingested fire potential tiles.
Sioux Falls: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Bison: 19/100 · Sioux Falls: 21/100
Sioux Falls is 2 points higher.
Bison: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Sioux Falls: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.