City vs city
Iowa City vs Sumner, IA
Iowa City currently scores 9 points higher overall than Sumner, 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
Iowa City: 48/100 · Sumner: 39/100
Iowa City is 9 points higher.
Flood
Iowa City: 64/100 · Sumner: 52/100
Iowa City is 12 points higher.
Iowa City: FEMA NFHL flood zones: 13 features intersect this tile.
Sumner: FEMA NFHL flood zones: 10 features intersect this tile.
Wind
Iowa City: 17/100 · Sumner: 17/100
No gap.
Iowa City: Wind exposure derived from ingested design wind / climatology tiles.
Sumner: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Iowa City: 47/100 · Sumner: 22/100
Iowa City is 25 points higher.
Iowa City: Lightning exposure derived from ingested climatology tiles.
Sumner: Lightning exposure derived from ingested climatology tiles.
Tornado
Iowa City: 38/100 · Sumner: 73/100
Sumner is 35 points higher.
Iowa City: Tornado risk derived from NOAA SPC historical reports.
Sumner: Tornado risk derived from NOAA SPC historical reports.
Hail
Iowa City: 100/100 · Sumner: 53/100
Iowa City is 47 points higher.
Iowa City: Hail risk derived from NOAA SPC historical reports.
Sumner: Hail risk derived from NOAA SPC historical reports.
Storm surge
Iowa City: Unavailable · Sumner: Unavailable
A score difference cannot be calculated without both sources.
Iowa City: Storm surge model is not available for this location yet.
Sumner: Storm surge model is not available for this location yet.
Wildfire
Iowa City: 43/100 · Sumner: 33/100
Iowa City is 10 points higher.
Iowa City: Wildfire exposure derived from ingested fire potential tiles.
Sumner: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Iowa City: 24/100 · Sumner: 21/100
Iowa City is 3 points higher.
Iowa 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.
Sumner: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.