City vs city
Sioux City vs Webster, IA
Sioux City currently scores 3 points higher overall than Webster, 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
Sioux City: 39/100 · Webster: 36/100
Sioux City is 3 points higher.
Flood
Sioux City: 4/100 · Webster: 66/100
Webster is 62 points higher.
Sioux City: FEMA NFHL flood zones: 2 features intersect this tile.
Webster: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Sioux City: 20/100 · Webster: 17/100
Sioux City is 3 points higher.
Sioux City: Wind exposure derived from ingested design wind / climatology tiles.
Webster: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Sioux City: 52/100 · Webster: 48/100
Sioux City is 4 points higher.
Sioux City: Lightning exposure derived from ingested climatology tiles.
Webster: Lightning exposure derived from ingested climatology tiles.
Tornado
Sioux City: 38/100 · Webster: 27/100
Sioux City is 11 points higher.
Sioux City: Tornado risk derived from NOAA SPC historical reports.
Webster: Tornado risk derived from NOAA SPC historical reports.
Hail
Sioux City: 86/100 · Webster: 28/100
Sioux City is 58 points higher.
Sioux City: Hail risk derived from NOAA SPC historical reports.
Webster: Hail risk derived from NOAA SPC historical reports.
Storm surge
Sioux City: Unavailable · Webster: Unavailable
A score difference cannot be calculated without both sources.
Sioux City: Storm surge model is not available for this location yet.
Webster: Storm surge model is not available for this location yet.
Wildfire
Sioux City: 48/100 · Webster: 40/100
Sioux City is 8 points higher.
Sioux City: Wildfire exposure derived from ingested fire potential tiles.
Webster: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Sioux City: 26/100 · Webster: 24/100
Sioux City is 2 points higher.
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.
Webster: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.