City vs city
Helena vs Nashua, MT
Helena currently scores 3 points higher overall than Nashua, with the largest gap in wildfire.
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
Helena: 34/100 · Nashua: 31/100
Helena is 3 points higher.
Flood
Helena: 17/100 · Nashua: 45/100
Nashua is 28 points higher.
Helena: FEMA NFHL flood zones: 4 features intersect this tile.
Nashua: FEMA NFHL flood zones: 6 features intersect this tile.
Wind
Helena: 15/100 · Nashua: 18/100
Nashua is 3 points higher.
Helena: Wind exposure derived from ingested design wind / climatology tiles.
Nashua: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Helena: 9/100 · Nashua: 16/100
Nashua is 7 points higher.
Helena: Lightning exposure derived from ingested climatology tiles.
Nashua: Lightning exposure derived from ingested climatology tiles.
Tornado
Helena: 4/100 · Nashua: 8/100
Nashua is 4 points higher.
Helena: Tornado risk derived from NOAA SPC historical reports.
Nashua: Tornado risk derived from NOAA SPC historical reports.
Hail
Helena: 100/100 · Nashua: 76/100
Helena is 24 points higher.
Helena: Hail risk derived from NOAA SPC historical reports.
Nashua: Hail risk derived from NOAA SPC historical reports.
Storm surge
Helena: Unavailable · Nashua: Unavailable
A score difference cannot be calculated without both sources.
Helena: Storm surge model is not available for this location yet.
Nashua: Storm surge model is not available for this location yet.
Wildfire
Helena: 77/100 · Nashua: 36/100
Helena is 41 points higher.
Helena: Wildfire exposure derived from ingested fire potential tiles.
Nashua: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Helena: 13/100 · Nashua: 21/100
Nashua is 8 points higher.
Helena: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Nashua: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.