City vs city
Perth vs Williston, ND
Williston currently scores 15 points higher overall than Perth, 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
Perth: 20/100 · Williston: 35/100
Williston is 15 points higher.
Flood
Perth: 0/100 · Williston: 41/100
Williston is 41 points higher.
Perth: FEMA NFHL flood zones: 0 features intersect this tile.
Williston: FEMA NFHL flood zones: 5 features intersect this tile.
Wind
Perth: 18/100 · Williston: 18/100
No gap.
Perth: Wind exposure derived from ingested design wind / climatology tiles.
Williston: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Perth: 8/100 · Williston: 19/100
Williston is 11 points higher.
Perth: Lightning exposure derived from ingested climatology tiles.
Williston: Lightning exposure derived from ingested climatology tiles.
Tornado
Perth: 0/100 · Williston: 4/100
Williston is 4 points higher.
Perth: Tornado risk derived from NOAA SPC historical reports.
Williston: Tornado risk derived from NOAA SPC historical reports.
Hail
Perth: 24/100 · Williston: 100/100
Williston is 76 points higher.
Perth: Hail risk derived from NOAA SPC historical reports.
Williston: Hail risk derived from NOAA SPC historical reports.
Storm surge
Perth: Unavailable · Williston: Unavailable
A score difference cannot be calculated without both sources.
Perth: Storm surge model is not available for this location yet.
Williston: Storm surge model is not available for this location yet.
Wildfire
Perth: 58/100 · Williston: 37/100
Perth is 21 points higher.
Perth: Wildfire exposure derived from ingested fire potential tiles.
Williston: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Perth: 13/100 · Williston: 23/100
Williston is 10 points higher.
Perth: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Williston: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.