City vs city
Merrifield vs Roanoke, VA
Merrifield currently scores 3 points higher overall than Roanoke, with the largest gap in lightning.
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
Merrifield: 42/100 · Roanoke: 39/100
Merrifield is 3 points higher.
Flood
Merrifield: 32/100 · Roanoke: 24/100
Merrifield is 8 points higher.
Merrifield: FEMA NFHL flood zones: 6 features intersect this tile.
Roanoke: FEMA NFHL flood zones: 9 features intersect this tile.
Wind
Merrifield: 20/100 · Roanoke: 17/100
Merrifield is 3 points higher.
Merrifield: Wind exposure derived from ingested design wind / climatology tiles.
Roanoke: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Merrifield: 39/100 · Roanoke: 30/100
Merrifield is 9 points higher.
Merrifield: Lightning exposure derived from ingested climatology tiles.
Roanoke: Lightning exposure derived from ingested climatology tiles.
Tornado
Merrifield: 19/100 · Roanoke: 19/100
No gap.
Merrifield: Tornado risk derived from NOAA SPC historical reports.
Roanoke: Tornado risk derived from NOAA SPC historical reports.
Hail
Merrifield: 100/100 · Roanoke: 100/100
No gap.
Merrifield: Hail risk derived from NOAA SPC historical reports.
Roanoke: Hail risk derived from NOAA SPC historical reports.
Storm surge
Merrifield: Unavailable · Roanoke: Unavailable
A score difference cannot be calculated without both sources.
Merrifield: Storm surge model is not available for this location yet.
Roanoke: Storm surge model is not available for this location yet.
Wildfire
Merrifield: 43/100 · Roanoke: 51/100
Roanoke is 8 points higher.
Merrifield: Wildfire exposure derived from ingested fire potential tiles.
Roanoke: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Merrifield: 40/100 · Roanoke: 35/100
Merrifield is 5 points higher.
Merrifield: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Roanoke: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.