City vs city
Boston vs Onset, MA
Boston currently scores 2 points higher overall than Onset, 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 is a current EPA AirNow signal; 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
Boston: 39/100 · Onset: 37/100
Boston is 2 points higher.
Flood
Boston: 48/100 · Onset: 58/100
Onset is 10 points higher.
Boston: FEMA NFHL flood zones: 21 features intersect this tile.
Onset: FEMA NFHL flood zones: 19 features intersect this tile.
Wind
Boston: 27/100 · Onset: 36/100
Onset is 9 points higher.
Boston: Wind exposure derived from ingested design wind / climatology tiles.
Onset: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Boston: 10/100 · Onset: 13/100
Onset is 3 points higher.
Boston: Lightning exposure derived from ingested climatology tiles.
Onset: Lightning exposure derived from ingested climatology tiles.
Tornado
Boston: 15/100 · Onset: 0/100
Boston is 15 points higher.
Boston: Tornado risk derived from NOAA SPC historical reports.
Onset: Tornado risk derived from NOAA SPC historical reports.
Hail
Boston: 30/100 · Onset: 13/100
Boston is 17 points higher.
Boston: Hail risk derived from NOAA SPC historical reports.
Onset: Hail risk derived from NOAA SPC historical reports.
Storm surge
Boston: 98/100 · Onset: 99/100
Onset is 1 points higher.
Boston: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Onset: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Boston: 57/100 · Onset: 12/100
Boston is 45 points higher.
Boston: Wildfire exposure derived from ingested fire potential tiles.
Onset: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Boston: 26/100 · Onset: 27/100
Onset is 1 points higher.
Boston: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Onset: Air quality signal derived from the latest EPA AirNow combined AQI grid.