City vs city
Arnold vs Herald Harbor, MD
Herald Harbor currently scores 3 points higher overall than Arnold, with the largest gap in tornado.
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
Arnold: 33/100 · Herald Harbor: 36/100
Herald Harbor is 3 points higher.
Flood
Arnold: 31/100 · Herald Harbor: 32/100
Herald Harbor is 1 points higher.
Arnold: FEMA NFHL flood zones: 10 features intersect this tile.
Herald Harbor: FEMA NFHL flood zones: 5 features intersect this tile.
Wind
Arnold: 22/100 · Herald Harbor: 21/100
Arnold is 1 points higher.
Arnold: Wind exposure derived from ingested design wind / climatology tiles.
Herald Harbor: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Arnold: 38/100 · Herald Harbor: 39/100
Herald Harbor is 1 points higher.
Arnold: Lightning exposure derived from ingested climatology tiles.
Herald Harbor: Lightning exposure derived from ingested climatology tiles.
Tornado
Arnold: 12/100 · Herald Harbor: 31/100
Herald Harbor is 19 points higher.
Arnold: Tornado risk derived from NOAA SPC historical reports.
Herald Harbor: Tornado risk derived from NOAA SPC historical reports.
Hail
Arnold: 25/100 · Herald Harbor: 28/100
Herald Harbor is 3 points higher.
Arnold: Hail risk derived from NOAA SPC historical reports.
Herald Harbor: Hail risk derived from NOAA SPC historical reports.
Storm surge
Arnold: 90/100 · Herald Harbor: 92/100
Herald Harbor is 2 points higher.
Arnold: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Herald Harbor: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Arnold: 1/100 · Herald Harbor: 3/100
Herald Harbor is 2 points higher.
Arnold: Wildfire exposure derived from ingested fire potential tiles.
Herald Harbor: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Arnold: 41/100 · Herald Harbor: 42/100
Herald Harbor is 1 points higher.
Arnold: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Herald Harbor: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.