City vs city
Grafton vs South Dennis, MA
Grafton and South Dennis are tied on overall score, with the biggest factor difference 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
Grafton: 33/100 · South Dennis: 33/100
No gap.
Flood
Grafton: 38/100 · South Dennis: 30/100
Grafton is 8 points higher.
Grafton: FEMA NFHL flood zones: 9 features intersect this tile.
South Dennis: FEMA NFHL flood zones: 6 features intersect this tile.
Wind
Grafton: 26/100 · South Dennis: 36/100
South Dennis is 10 points higher.
Grafton: Wind exposure derived from ingested design wind / climatology tiles.
South Dennis: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grafton: 9/100 · South Dennis: 11/100
South Dennis is 2 points higher.
Grafton: Lightning exposure derived from ingested climatology tiles.
South Dennis: Lightning exposure derived from ingested climatology tiles.
Tornado
Grafton: 0/100 · South Dennis: 0/100
No gap.
Grafton: Tornado risk derived from NOAA SPC historical reports.
South Dennis: Tornado risk derived from NOAA SPC historical reports.
Hail
Grafton: 38/100 · South Dennis: 9/100
Grafton is 29 points higher.
Grafton: Hail risk derived from NOAA SPC historical reports.
South Dennis: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grafton: Unavailable · South Dennis: 95/100
A score difference cannot be calculated without both sources.
Grafton: Storm surge model is not available for this location yet.
South Dennis: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Grafton: 57/100 · South Dennis: 23/100
Grafton is 34 points higher.
Grafton: Wildfire exposure derived from ingested fire potential tiles.
South Dennis: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Grafton: 27/100 · South Dennis: 26/100
Grafton is 1 points higher.
Grafton: 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 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.