City vs city
Derwood vs Rockville, MD
Rockville currently scores 3 points higher overall than Derwood, with the largest gap in flood.
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 is a current EPA AirNow signal; 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
Derwood: 37/100 · Rockville: 40/100
Rockville is 3 points higher.
Flood
Derwood: 20/100 · Rockville: 0/100
Derwood is 20 points higher.
Derwood: FEMA NFHL flood zones: 2 features intersect this tile.
Rockville: FEMA NFHL flood zones: 0 features intersect this tile.
Wind
Derwood: 21/100 · Rockville: 20/100
Derwood is 1 points higher.
Derwood: Wind exposure derived from ingested design wind / climatology tiles.
Rockville: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Derwood: 36/100 · Rockville: 37/100
Rockville is 1 points higher.
Derwood: Lightning exposure derived from ingested climatology tiles.
Rockville: Lightning exposure derived from ingested climatology tiles.
Tornado
Derwood: 15/100 · Rockville: 0/100
Derwood is 15 points higher.
Derwood: Tornado risk derived from NOAA SPC historical reports.
Rockville: Tornado risk derived from NOAA SPC historical reports.
Hail
Derwood: 83/100 · Rockville: 100/100
Rockville is 17 points higher.
Derwood: Hail risk derived from NOAA SPC historical reports.
Rockville: Hail risk derived from NOAA SPC historical reports.
Storm surge
Derwood: Unavailable · Rockville: Unavailable
A score difference cannot be calculated without both sources.
Derwood: Storm surge model is not available for this location yet.
Rockville: Storm surge model is not available for this location yet.
Wildfire
Derwood: 41/100 · Rockville: 36/100
Derwood is 5 points higher.
Derwood: Wildfire exposure derived from ingested fire potential tiles.
Rockville: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Derwood: 43/100 · Rockville: 44/100
Rockville is 1 points higher.
Derwood: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Rockville: Air quality signal derived from the latest EPA AirNow combined AQI grid.