City vs city
Mount Vernon vs Sioux Falls, SD
Sioux Falls currently scores 8 points higher overall than Mount Vernon, 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
Mount Vernon: 42/100 · Sioux Falls: 50/100
Sioux Falls is 8 points higher.
Flood
Mount Vernon: 41/100 · Sioux Falls: 52/100
Sioux Falls is 11 points higher.
Mount Vernon: FEMA NFHL flood zones: 2 features intersect this tile.
Sioux Falls: FEMA NFHL flood zones: 17 features intersect this tile.
Wind
Mount Vernon: 21/100 · Sioux Falls: 20/100
Mount Vernon is 1 points higher.
Mount Vernon: Wind exposure derived from ingested design wind / climatology tiles.
Sioux Falls: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Mount Vernon: 49/100 · Sioux Falls: 46/100
Mount Vernon is 3 points higher.
Mount Vernon: Lightning exposure derived from ingested climatology tiles.
Sioux Falls: Lightning exposure derived from ingested climatology tiles.
Tornado
Mount Vernon: 23/100 · Sioux Falls: 58/100
Sioux Falls is 35 points higher.
Mount Vernon: Tornado risk derived from NOAA SPC historical reports.
Sioux Falls: Tornado risk derived from NOAA SPC historical reports.
Hail
Mount Vernon: 71/100 · Sioux Falls: 100/100
Sioux Falls is 29 points higher.
Mount Vernon: Hail risk derived from NOAA SPC historical reports.
Sioux Falls: Hail risk derived from NOAA SPC historical reports.
Storm surge
Mount Vernon: Unavailable · Sioux Falls: Unavailable
A score difference cannot be calculated without both sources.
Mount Vernon: Storm surge model is not available for this location yet.
Sioux Falls: Storm surge model is not available for this location yet.
Wildfire
Mount Vernon: 47/100 · Sioux Falls: 51/100
Sioux Falls is 4 points higher.
Mount Vernon: Wildfire exposure derived from ingested fire potential tiles.
Sioux Falls: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Mount Vernon: Unavailable · Sioux Falls: 21/100
A score difference cannot be calculated without both sources.
Mount Vernon: Air quality model is not available for this location yet.
Sioux Falls: Air quality signal derived from the latest EPA AirNow combined AQI grid.