City vs city
Broken Arrow vs Helena, OK
Broken Arrow currently scores 20 points higher overall than Helena, with the largest gap in tornado.
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
Broken Arrow: 56/100 · Helena: 36/100
Broken Arrow is 20 points higher.
Flood
Broken Arrow: 50/100 · Helena: Unavailable
A score difference cannot be calculated without both sources.
Broken Arrow: FEMA NFHL flood zones: 8 features intersect this tile.
Helena: Flood model is not available for this location yet.
Wind
Broken Arrow: 17/100 · Helena: 18/100
Helena is 1 points higher.
Broken Arrow: Wind exposure derived from ingested design wind / climatology tiles.
Helena: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Broken Arrow: 58/100 · Helena: 67/100
Helena is 9 points higher.
Broken Arrow: Lightning exposure derived from ingested climatology tiles.
Helena: Lightning exposure derived from ingested climatology tiles.
Tornado
Broken Arrow: 100/100 · Helena: 19/100
Broken Arrow is 81 points higher.
Broken Arrow: Tornado risk derived from NOAA SPC historical reports.
Helena: Tornado risk derived from NOAA SPC historical reports.
Hail
Broken Arrow: 100/100 · Helena: 95/100
Broken Arrow is 5 points higher.
Broken Arrow: Hail risk derived from NOAA SPC historical reports.
Helena: Hail risk derived from NOAA SPC historical reports.
Storm surge
Broken Arrow: Unavailable · Helena: Unavailable
A score difference cannot be calculated without both sources.
Broken Arrow: Storm surge model is not available for this location yet.
Helena: Storm surge model is not available for this location yet.
Wildfire
Broken Arrow: 37/100 · Helena: 26/100
Broken Arrow is 11 points higher.
Broken Arrow: Wildfire exposure derived from ingested fire potential tiles.
Helena: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Broken Arrow: 27/100 · Helena: 26/100
Broken Arrow is 1 points higher.
Broken Arrow: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
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.