City vs city
Nashua vs Sioux City, IA
Sioux City currently scores 3 points higher overall than Nashua, 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
Nashua: 36/100 · Sioux City: 39/100
Sioux City is 3 points higher.
Flood
Nashua: 71/100 · Sioux City: 4/100
Nashua is 67 points higher.
Nashua: FEMA NFHL flood zones: 12 features intersect this tile.
Sioux City: FEMA NFHL flood zones: 2 features intersect this tile.
Wind
Nashua: 17/100 · Sioux City: 20/100
Sioux City is 3 points higher.
Nashua: Wind exposure derived from ingested design wind / climatology tiles.
Sioux City: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Nashua: 20/100 · Sioux City: 52/100
Sioux City is 32 points higher.
Nashua: Lightning exposure derived from ingested climatology tiles.
Sioux City: Lightning exposure derived from ingested climatology tiles.
Tornado
Nashua: 19/100 · Sioux City: 38/100
Sioux City is 19 points higher.
Nashua: Tornado risk derived from NOAA SPC historical reports.
Sioux City: Tornado risk derived from NOAA SPC historical reports.
Hail
Nashua: 67/100 · Sioux City: 86/100
Sioux City is 19 points higher.
Nashua: Hail risk derived from NOAA SPC historical reports.
Sioux City: Hail risk derived from NOAA SPC historical reports.
Storm surge
Nashua: Unavailable · Sioux City: Unavailable
A score difference cannot be calculated without both sources.
Nashua: Storm surge model is not available for this location yet.
Sioux City: Storm surge model is not available for this location yet.
Wildfire
Nashua: 35/100 · Sioux City: 48/100
Sioux City is 13 points higher.
Nashua: Wildfire exposure derived from ingested fire potential tiles.
Sioux City: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Nashua: 21/100 · Sioux City: 26/100
Sioux City is 5 points higher.
Nashua: 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.