City vs city
Charlestown vs Columbia, MD
Charlestown currently scores 4 points higher overall than Columbia, 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
Charlestown: 39/100 · Columbia: 35/100
Charlestown is 4 points higher.
Flood
Charlestown: 26/100 · Columbia: 24/100
Charlestown is 2 points higher.
Charlestown: FEMA NFHL flood zones: 7 features intersect this tile.
Columbia: FEMA NFHL flood zones: 7 features intersect this tile.
Wind
Charlestown: 22/100 · Columbia: 21/100
Charlestown is 1 points higher.
Charlestown: Wind exposure derived from ingested design wind / climatology tiles.
Columbia: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Charlestown: 41/100 · Columbia: 39/100
Charlestown is 2 points higher.
Charlestown: Lightning exposure derived from ingested climatology tiles.
Columbia: Lightning exposure derived from ingested climatology tiles.
Tornado
Charlestown: 23/100 · Columbia: 19/100
Charlestown is 4 points higher.
Charlestown: Tornado risk derived from NOAA SPC historical reports.
Columbia: Tornado risk derived from NOAA SPC historical reports.
Hail
Charlestown: 14/100 · Columbia: 58/100
Columbia is 44 points higher.
Charlestown: Hail risk derived from NOAA SPC historical reports.
Columbia: Hail risk derived from NOAA SPC historical reports.
Storm surge
Charlestown: 98/100 · Columbia: Unavailable
A score difference cannot be calculated without both sources.
Charlestown: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Columbia: Storm surge model is not available for this location yet.
Wildfire
Charlestown: 41/100 · Columbia: 40/100
Charlestown is 1 points higher.
Charlestown: Wildfire exposure derived from ingested fire potential tiles.
Columbia: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Charlestown: 44/100 · Columbia: 42/100
Charlestown is 2 points higher.
Charlestown: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Columbia: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.