City vs city
Dennis vs South Yarmouth, MA
South Yarmouth currently scores 3 points higher overall than Dennis, 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 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 · South Yarmouth: 35/100
South Yarmouth is 3 points higher.
Flood
Dennis: 43/100 · South Yarmouth: 34/100
Dennis is 9 points higher.
Dennis: FEMA NFHL flood zones: 14 features intersect this tile.
South Yarmouth: FEMA NFHL flood zones: 13 features intersect this tile.
Wind
Dennis: 37/100 · South Yarmouth: 37/100
No gap.
Dennis: Wind exposure derived from ingested design wind / climatology tiles.
South Yarmouth: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Dennis: 9/100 · South Yarmouth: 11/100
South Yarmouth is 2 points higher.
Dennis: Lightning exposure derived from ingested climatology tiles.
South Yarmouth: Lightning exposure derived from ingested climatology tiles.
Tornado
Dennis: 0/100 · South Yarmouth: 23/100
South Yarmouth is 23 points higher.
Dennis: Tornado risk derived from NOAA SPC historical reports.
South Yarmouth: Tornado risk derived from NOAA SPC historical reports.
Hail
Dennis: 7/100 · South Yarmouth: 6/100
Dennis is 1 points higher.
Dennis: Hail risk derived from NOAA SPC historical reports.
South Yarmouth: Hail risk derived from NOAA SPC historical reports.
Storm surge
Dennis: 97/100 · South Yarmouth: 97/100
No gap.
Dennis: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
South Yarmouth: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Dennis: 6/100 · South Yarmouth: 42/100
South Yarmouth is 36 points higher.
Dennis: Wildfire exposure derived from ingested fire potential tiles.
South Yarmouth: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Dennis: 26/100 · South Yarmouth: 27/100
South Yarmouth 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.
South Yarmouth: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.