City vs city
Chelsea vs Somerville, MA
Chelsea currently scores 1 points higher overall than Somerville, with the largest gap in hail.
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
Chelsea: 39/100 · Somerville: 38/100
Chelsea is 1 points higher.
Flood
Chelsea: 48/100 · Somerville: 30/100
Chelsea is 18 points higher.
Chelsea: FEMA NFHL flood zones: 21 features intersect this tile.
Somerville: FEMA NFHL flood zones: 9 features intersect this tile.
Wind
Chelsea: 27/100 · Somerville: 27/100
No gap.
Chelsea: Wind exposure derived from ingested design wind / climatology tiles.
Somerville: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Chelsea: 10/100 · Somerville: 10/100
No gap.
Chelsea: Lightning exposure derived from ingested climatology tiles.
Somerville: Lightning exposure derived from ingested climatology tiles.
Tornado
Chelsea: 15/100 · Somerville: 8/100
Chelsea is 7 points higher.
Chelsea: Tornado risk derived from NOAA SPC historical reports.
Somerville: Tornado risk derived from NOAA SPC historical reports.
Hail
Chelsea: 30/100 · Somerville: 58/100
Somerville is 28 points higher.
Chelsea: Hail risk derived from NOAA SPC historical reports.
Somerville: Hail risk derived from NOAA SPC historical reports.
Storm surge
Chelsea: 98/100 · Somerville: 82/100
Chelsea is 16 points higher.
Chelsea: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Somerville: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Chelsea: 57/100 · Somerville: 65/100
Somerville is 8 points higher.
Chelsea: Wildfire exposure derived from ingested fire potential tiles.
Somerville: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Chelsea: 26/100 · Somerville: 26/100
No gap.
Chelsea: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Somerville: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.