City vs city
Somerville vs Watertown Town, MA
Somerville and Watertown Town are tied on overall score, with the biggest factor difference 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
Somerville: 38/100 · Watertown Town: 38/100
No gap.
Flood
Somerville: 30/100 · Watertown Town: 30/100
No gap.
Somerville: FEMA NFHL flood zones: 9 features intersect this tile.
Watertown Town: FEMA NFHL flood zones: 9 features intersect this tile.
Wind
Somerville: 27/100 · Watertown Town: 27/100
No gap.
Somerville: Wind exposure derived from ingested design wind / climatology tiles.
Watertown Town: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Somerville: 10/100 · Watertown Town: 10/100
No gap.
Somerville: Lightning exposure derived from ingested climatology tiles.
Watertown Town: Lightning exposure derived from ingested climatology tiles.
Tornado
Somerville: 8/100 · Watertown Town: 8/100
No gap.
Somerville: Tornado risk derived from NOAA SPC historical reports.
Watertown Town: Tornado risk derived from NOAA SPC historical reports.
Hail
Somerville: 58/100 · Watertown Town: 58/100
No gap.
Somerville: Hail risk derived from NOAA SPC historical reports.
Watertown Town: Hail risk derived from NOAA SPC historical reports.
Storm surge
Somerville: 82/100 · Watertown Town: 82/100
No gap.
Somerville: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Watertown Town: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Somerville: 65/100 · Watertown Town: 65/100
No gap.
Somerville: Wildfire exposure derived from ingested fire potential tiles.
Watertown Town: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Somerville: 26/100 · Watertown Town: 26/100
No gap.
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.
Watertown Town: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.