City vs city
Dennis vs Onset, MA
Onset currently scores 5 points higher overall than Dennis, 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
Dennis: 32/100 · Onset: 37/100
Onset is 5 points higher.
Flood
Dennis: 43/100 · Onset: 58/100
Onset is 15 points higher.
Dennis: FEMA NFHL flood zones: 14 features intersect this tile.
Onset: FEMA NFHL flood zones: 19 features intersect this tile.
Wind
Dennis: 37/100 · Onset: 36/100
Dennis is 1 points higher.
Dennis: Wind exposure derived from ingested design wind / climatology tiles.
Onset: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Dennis: 9/100 · Onset: 13/100
Onset is 4 points higher.
Dennis: Lightning exposure derived from ingested climatology tiles.
Onset: Lightning exposure derived from ingested climatology tiles.
Tornado
Dennis: 0/100 · Onset: 0/100
No gap.
Dennis: Tornado risk derived from NOAA SPC historical reports.
Onset: Tornado risk derived from NOAA SPC historical reports.
Hail
Dennis: 7/100 · Onset: 13/100
Onset is 6 points higher.
Dennis: Hail risk derived from NOAA SPC historical reports.
Onset: Hail risk derived from NOAA SPC historical reports.
Storm surge
Dennis: 97/100 · Onset: 99/100
Onset is 2 points higher.
Dennis: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Onset: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Dennis: 6/100 · Onset: 12/100
Onset is 6 points higher.
Dennis: Wildfire exposure derived from ingested fire potential tiles.
Onset: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Dennis: 26/100 · Onset: 27/100
Onset is 1 points higher.
Dennis: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Onset: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.