City vs city
Grafton vs South Lancaster, MA
Grafton currently scores 9 points higher overall than South Lancaster, 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
Grafton: 33/100 · South Lancaster: 24/100
Grafton is 9 points higher.
Flood
Grafton: 38/100 · South Lancaster: 46/100
South Lancaster is 8 points higher.
Grafton: FEMA NFHL flood zones: 9 features intersect this tile.
South Lancaster: FEMA NFHL flood zones: 13 features intersect this tile.
Wind
Grafton: 26/100 · South Lancaster: 24/100
Grafton is 2 points higher.
Grafton: Wind exposure derived from ingested design wind / climatology tiles.
South Lancaster: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grafton: 9/100 · South Lancaster: 7/100
Grafton is 2 points higher.
Grafton: Lightning exposure derived from ingested climatology tiles.
South Lancaster: Lightning exposure derived from ingested climatology tiles.
Tornado
Grafton: 0/100 · South Lancaster: 4/100
South Lancaster is 4 points higher.
Grafton: Tornado risk derived from NOAA SPC historical reports.
South Lancaster: Tornado risk derived from NOAA SPC historical reports.
Hail
Grafton: 38/100 · South Lancaster: 18/100
Grafton is 20 points higher.
Grafton: Hail risk derived from NOAA SPC historical reports.
South Lancaster: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grafton: Unavailable · South Lancaster: Unavailable
A score difference cannot be calculated without both sources.
Grafton: Storm surge model is not available for this location yet.
South Lancaster: Storm surge model is not available for this location yet.
Wildfire
Grafton: 57/100 · South Lancaster: 44/100
Grafton is 13 points higher.
Grafton: Wildfire exposure derived from ingested fire potential tiles.
South Lancaster: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Grafton: 27/100 · South Lancaster: 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 Lancaster: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.