City vs city
Perth vs Rolla, ND
Rolla currently scores 3 points higher overall than Perth, 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
Perth: 20/100 · Rolla: 23/100
Rolla is 3 points higher.
Flood
Perth: 0/100 · Rolla: 36/100
Rolla is 36 points higher.
Perth: FEMA NFHL flood zones: 0 features intersect this tile.
Rolla: FEMA NFHL flood zones: 1 features intersect this tile.
Wind
Perth: 18/100 · Rolla: 18/100
No gap.
Perth: Wind exposure derived from ingested design wind / climatology tiles.
Rolla: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Perth: 8/100 · Rolla: 7/100
Perth is 1 points higher.
Perth: Lightning exposure derived from ingested climatology tiles.
Rolla: Lightning exposure derived from ingested climatology tiles.
Tornado
Perth: 0/100 · Rolla: 8/100
Rolla is 8 points higher.
Perth: Tornado risk derived from NOAA SPC historical reports.
Rolla: Tornado risk derived from NOAA SPC historical reports.
Hail
Perth: 24/100 · Rolla: 20/100
Perth is 4 points higher.
Perth: Hail risk derived from NOAA SPC historical reports.
Rolla: Hail risk derived from NOAA SPC historical reports.
Storm surge
Perth: Unavailable · Rolla: Unavailable
A score difference cannot be calculated without both sources.
Perth: Storm surge model is not available for this location yet.
Rolla: Storm surge model is not available for this location yet.
Wildfire
Perth: 58/100 · Rolla: 59/100
Rolla is 1 points higher.
Perth: Wildfire exposure derived from ingested fire potential tiles.
Rolla: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Perth: 13/100 · Rolla: 13/100
No gap.
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.
Rolla: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.