City vs city
Mount Vernon vs Sioux City, IA
Sioux City currently scores 4 points higher overall than Mount Vernon, with the largest gap in flood.
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
Mount Vernon: 35/100 · Sioux City: 39/100
Sioux City is 4 points higher.
Flood
Mount Vernon: 45/100 · Sioux City: 4/100
Mount Vernon is 41 points higher.
Mount Vernon: FEMA NFHL flood zones: 3 features intersect this tile.
Sioux City: FEMA NFHL flood zones: 2 features intersect this tile.
Wind
Mount Vernon: 17/100 · Sioux City: 20/100
Sioux City is 3 points higher.
Mount Vernon: Wind exposure derived from ingested design wind / climatology tiles.
Sioux City: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Mount Vernon: 43/100 · Sioux City: 52/100
Sioux City is 9 points higher.
Mount Vernon: Lightning exposure derived from ingested climatology tiles.
Sioux City: Lightning exposure derived from ingested climatology tiles.
Tornado
Mount Vernon: 8/100 · Sioux City: 38/100
Sioux City is 30 points higher.
Mount Vernon: Tornado risk derived from NOAA SPC historical reports.
Sioux City: Tornado risk derived from NOAA SPC historical reports.
Hail
Mount Vernon: 63/100 · Sioux City: 86/100
Sioux City is 23 points higher.
Mount Vernon: Hail risk derived from NOAA SPC historical reports.
Sioux City: Hail risk derived from NOAA SPC historical reports.
Storm surge
Mount Vernon: Unavailable · Sioux City: Unavailable
A score difference cannot be calculated without both sources.
Mount Vernon: Storm surge model is not available for this location yet.
Sioux City: Storm surge model is not available for this location yet.
Wildfire
Mount Vernon: 41/100 · Sioux City: 48/100
Sioux City is 7 points higher.
Mount Vernon: Wildfire exposure derived from ingested fire potential tiles.
Sioux City: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Mount Vernon: 26/100 · Sioux City: 26/100
No gap.
Mount Vernon: 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 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.