City vs city
Knoxville vs Williamson, IA
Knoxville currently scores 2 points higher overall than Williamson, 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
Knoxville: 38/100 · Williamson: 36/100
Knoxville is 2 points higher.
Flood
Knoxville: 77/100 · Williamson: 49/100
Knoxville is 28 points higher.
Knoxville: FEMA NFHL flood zones: 4 features intersect this tile.
Williamson: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Knoxville: 18/100 · Williamson: 18/100
No gap.
Knoxville: Wind exposure derived from ingested design wind / climatology tiles.
Williamson: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Knoxville: 60/100 · Williamson: 61/100
Williamson is 1 points higher.
Knoxville: Lightning exposure derived from ingested climatology tiles.
Williamson: Lightning exposure derived from ingested climatology tiles.
Tornado
Knoxville: 8/100 · Williamson: 0/100
Knoxville is 8 points higher.
Knoxville: Tornado risk derived from NOAA SPC historical reports.
Williamson: Tornado risk derived from NOAA SPC historical reports.
Hail
Knoxville: 45/100 · Williamson: 20/100
Knoxville is 25 points higher.
Knoxville: Hail risk derived from NOAA SPC historical reports.
Williamson: Hail risk derived from NOAA SPC historical reports.
Storm surge
Knoxville: Unavailable · Williamson: Unavailable
A score difference cannot be calculated without both sources.
Knoxville: Storm surge model is not available for this location yet.
Williamson: Storm surge model is not available for this location yet.
Wildfire
Knoxville: 26/100 · Williamson: 35/100
Williamson is 9 points higher.
Knoxville: Wildfire exposure derived from ingested fire potential tiles.
Williamson: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Knoxville: 31/100 · Williamson: 31/100
No gap.
Knoxville: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Williamson: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.