City vs city
Northwest Harwich vs South Dennis, MA
South Dennis currently scores 1 points higher overall than Northwest Harwich, 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
Northwest Harwich: 32/100 · South Dennis: 33/100
South Dennis is 1 points higher.
Flood
Northwest Harwich: 43/100 · South Dennis: 30/100
Northwest Harwich is 13 points higher.
Northwest Harwich: FEMA NFHL flood zones: 14 features intersect this tile.
South Dennis: FEMA NFHL flood zones: 6 features intersect this tile.
Wind
Northwest Harwich: 37/100 · South Dennis: 36/100
Northwest Harwich is 1 points higher.
Northwest Harwich: Wind exposure derived from ingested design wind / climatology tiles.
South Dennis: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Northwest Harwich: 9/100 · South Dennis: 11/100
South Dennis is 2 points higher.
Northwest Harwich: Lightning exposure derived from ingested climatology tiles.
South Dennis: Lightning exposure derived from ingested climatology tiles.
Tornado
Northwest Harwich: 0/100 · South Dennis: 0/100
No gap.
Northwest Harwich: Tornado risk derived from NOAA SPC historical reports.
South Dennis: Tornado risk derived from NOAA SPC historical reports.
Hail
Northwest Harwich: 7/100 · South Dennis: 9/100
South Dennis is 2 points higher.
Northwest Harwich: Hail risk derived from NOAA SPC historical reports.
South Dennis: Hail risk derived from NOAA SPC historical reports.
Storm surge
Northwest Harwich: 97/100 · South Dennis: 95/100
Northwest Harwich is 2 points higher.
Northwest Harwich: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
South Dennis: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Northwest Harwich: 6/100 · South Dennis: 23/100
South Dennis is 17 points higher.
Northwest Harwich: Wildfire exposure derived from ingested fire potential tiles.
South Dennis: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Northwest Harwich: 26/100 · South Dennis: 26/100
No gap.
Northwest Harwich: 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.