City vs city
Onawa vs Sergeant Bluff, IA
Sergeant Bluff currently scores 5 points higher overall than Onawa, with the largest gap in hail.
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
Onawa: 36/100 · Sergeant Bluff: 41/100
Sergeant Bluff is 5 points higher.
Flood
Onawa: 0/100 · Sergeant Bluff: 8/100
Sergeant Bluff is 8 points higher.
Onawa: FEMA NFHL flood zones: 0 features intersect this tile.
Sergeant Bluff: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Onawa: 20/100 · Sergeant Bluff: 20/100
No gap.
Onawa: Wind exposure derived from ingested design wind / climatology tiles.
Sergeant Bluff: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Onawa: 60/100 · Sergeant Bluff: 54/100
Onawa is 6 points higher.
Onawa: Lightning exposure derived from ingested climatology tiles.
Sergeant Bluff: Lightning exposure derived from ingested climatology tiles.
Tornado
Onawa: 0/100 · Sergeant Bluff: 27/100
Sergeant Bluff is 27 points higher.
Onawa: Tornado risk derived from NOAA SPC historical reports.
Sergeant Bluff: Tornado risk derived from NOAA SPC historical reports.
Hail
Onawa: 65/100 · Sergeant Bluff: 100/100
Sergeant Bluff is 35 points higher.
Onawa: Hail risk derived from NOAA SPC historical reports.
Sergeant Bluff: Hail risk derived from NOAA SPC historical reports.
Storm surge
Onawa: Unavailable · Sergeant Bluff: Unavailable
A score difference cannot be calculated without both sources.
Onawa: Storm surge model is not available for this location yet.
Sergeant Bluff: Storm surge model is not available for this location yet.
Wildfire
Onawa: 49/100 · Sergeant Bluff: 54/100
Sergeant Bluff is 5 points higher.
Onawa: Wildfire exposure derived from ingested fire potential tiles.
Sergeant Bluff: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Onawa: 22/100 · Sergeant Bluff: 26/100
Sergeant Bluff is 4 points higher.
Onawa: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Sergeant Bluff: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.