City vs city
Rock Rapids vs Sioux City, IA
Rock Rapids currently scores 9 points higher overall than Sioux City, 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
Rock Rapids: 48/100 · Sioux City: 39/100
Rock Rapids is 9 points higher.
Flood
Rock Rapids: 71/100 · Sioux City: 4/100
Rock Rapids is 67 points higher.
Rock Rapids: FEMA NFHL flood zones: 9 features intersect this tile.
Sioux City: FEMA NFHL flood zones: 2 features intersect this tile.
Wind
Rock Rapids: 20/100 · Sioux City: 20/100
No gap.
Rock Rapids: Wind exposure derived from ingested design wind / climatology tiles.
Sioux City: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Rock Rapids: 45/100 · Sioux City: 52/100
Sioux City is 7 points higher.
Rock Rapids: Lightning exposure derived from ingested climatology tiles.
Sioux City: Lightning exposure derived from ingested climatology tiles.
Tornado
Rock Rapids: 0/100 · Sioux City: 38/100
Sioux City is 38 points higher.
Rock Rapids: Tornado risk derived from NOAA SPC historical reports.
Sioux City: Tornado risk derived from NOAA SPC historical reports.
Hail
Rock Rapids: 100/100 · Sioux City: 86/100
Rock Rapids is 14 points higher.
Rock Rapids: Hail risk derived from NOAA SPC historical reports.
Sioux City: Hail risk derived from NOAA SPC historical reports.
Storm surge
Rock Rapids: Unavailable · Sioux City: Unavailable
A score difference cannot be calculated without both sources.
Rock Rapids: Storm surge model is not available for this location yet.
Sioux City: Storm surge model is not available for this location yet.
Wildfire
Rock Rapids: 32/100 · Sioux City: 48/100
Sioux City is 16 points higher.
Rock Rapids: Wildfire exposure derived from ingested fire potential tiles.
Sioux City: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Rock Rapids: 21/100 · Sioux City: 26/100
Sioux City is 5 points higher.
Rock Rapids: 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.