City vs city
Helena vs Sun River, MT
Helena and Sun River are tied on overall score, with the biggest factor difference 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 · Sun River: 34/100
No gap.
Flood
Helena: 17/100 · Sun River: 41/100
Sun River is 24 points higher.
Helena: FEMA NFHL flood zones: 4 features intersect this tile.
Sun River: FEMA NFHL flood zones: 6 features intersect this tile.
Wind
Helena: 15/100 · Sun River: 15/100
No gap.
Helena: Wind exposure derived from ingested design wind / climatology tiles.
Sun River: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Helena: 9/100 · Sun River: 14/100
Sun River is 5 points higher.
Helena: Lightning exposure derived from ingested climatology tiles.
Sun River: Lightning exposure derived from ingested climatology tiles.
Tornado
Helena: 4/100 · Sun River: 0/100
Helena is 4 points higher.
Helena: Tornado risk derived from NOAA SPC historical reports.
Sun River: Tornado risk derived from NOAA SPC historical reports.
Hail
Helena: 100/100 · Sun River: 75/100
Helena is 25 points higher.
Helena: Hail risk derived from NOAA SPC historical reports.
Sun River: Hail risk derived from NOAA SPC historical reports.
Storm surge
Helena: Unavailable · Sun River: Unavailable
A score difference cannot be calculated without both sources.
Helena: Storm surge model is not available for this location yet.
Sun River: Storm surge model is not available for this location yet.
Wildfire
Helena: 77/100 · Sun River: 30/100
Helena is 47 points higher.
Helena: Wildfire exposure derived from ingested fire potential tiles.
Sun River: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Helena: 13/100 · Sun River: 27/100
Sun River is 14 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.
Sun River: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.