City vs city
Dennis vs Waltham, MA
Dennis and Waltham 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
Dennis: 32/100 · Waltham: 32/100
No gap.
Flood
Dennis: 43/100 · Waltham: 38/100
Dennis is 5 points higher.
Dennis: FEMA NFHL flood zones: 14 features intersect this tile.
Waltham: FEMA NFHL flood zones: 9 features intersect this tile.
Wind
Dennis: 37/100 · Waltham: 27/100
Dennis is 10 points higher.
Dennis: Wind exposure derived from ingested design wind / climatology tiles.
Waltham: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Dennis: 9/100 · Waltham: 9/100
No gap.
Dennis: Lightning exposure derived from ingested climatology tiles.
Waltham: Lightning exposure derived from ingested climatology tiles.
Tornado
Dennis: 0/100 · Waltham: 8/100
Waltham is 8 points higher.
Dennis: Tornado risk derived from NOAA SPC historical reports.
Waltham: Tornado risk derived from NOAA SPC historical reports.
Hail
Dennis: 7/100 · Waltham: 50/100
Waltham is 43 points higher.
Dennis: Hail risk derived from NOAA SPC historical reports.
Waltham: Hail risk derived from NOAA SPC historical reports.
Storm surge
Dennis: 97/100 · Waltham: Unavailable
A score difference cannot be calculated without both sources.
Dennis: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Waltham: Storm surge model is not available for this location yet.
Wildfire
Dennis: 6/100 · Waltham: 64/100
Waltham is 58 points higher.
Dennis: Wildfire exposure derived from ingested fire potential tiles.
Waltham: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Dennis: 26/100 · Waltham: 26/100
No gap.
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.
Waltham: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.