City vs city
Sigourney vs Williamsburg, IA
Sigourney currently scores 2 points higher overall than Williamsburg, 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
Sigourney: 34/100 · Williamsburg: 32/100
Sigourney is 2 points higher.
Flood
Sigourney: 66/100 · Williamsburg: 47/100
Sigourney is 19 points higher.
Sigourney: FEMA NFHL flood zones: 3 features intersect this tile.
Williamsburg: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Sigourney: 17/100 · Williamsburg: 17/100
No gap.
Sigourney: Wind exposure derived from ingested design wind / climatology tiles.
Williamsburg: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Sigourney: 49/100 · Williamsburg: 47/100
Sigourney is 2 points higher.
Sigourney: Lightning exposure derived from ingested climatology tiles.
Williamsburg: Lightning exposure derived from ingested climatology tiles.
Tornado
Sigourney: 8/100 · Williamsburg: 8/100
No gap.
Sigourney: Tornado risk derived from NOAA SPC historical reports.
Williamsburg: Tornado risk derived from NOAA SPC historical reports.
Hail
Sigourney: 40/100 · Williamsburg: 32/100
Sigourney is 8 points higher.
Sigourney: Hail risk derived from NOAA SPC historical reports.
Williamsburg: Hail risk derived from NOAA SPC historical reports.
Storm surge
Sigourney: Unavailable · Williamsburg: Unavailable
A score difference cannot be calculated without both sources.
Sigourney: Storm surge model is not available for this location yet.
Williamsburg: Storm surge model is not available for this location yet.
Wildfire
Sigourney: 32/100 · Williamsburg: 44/100
Williamsburg is 12 points higher.
Sigourney: Wildfire exposure derived from ingested fire potential tiles.
Williamsburg: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Sigourney: 24/100 · Williamsburg: 26/100
Williamsburg is 2 points higher.
Sigourney: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Williamsburg: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.