City vs city
Chantilly vs South Riding, VA
Chantilly currently scores 13 points higher overall than South Riding, 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 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
Chantilly: 46/100 · South Riding: 33/100
Chantilly is 13 points higher.
Flood
Chantilly: 36/100 · South Riding: 29/100
Chantilly is 7 points higher.
Chantilly: FEMA NFHL flood zones: 9 features intersect this tile.
South Riding: FEMA NFHL flood zones: 7 features intersect this tile.
Wind
Chantilly: 20/100 · South Riding: 20/100
No gap.
Chantilly: Wind exposure derived from ingested design wind / climatology tiles.
South Riding: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Chantilly: 38/100 · South Riding: 37/100
Chantilly is 1 points higher.
Chantilly: Lightning exposure derived from ingested climatology tiles.
South Riding: Lightning exposure derived from ingested climatology tiles.
Tornado
Chantilly: 42/100 · South Riding: 12/100
Chantilly is 30 points higher.
Chantilly: Tornado risk derived from NOAA SPC historical reports.
South Riding: Tornado risk derived from NOAA SPC historical reports.
Hail
Chantilly: 100/100 · South Riding: 52/100
Chantilly is 48 points higher.
Chantilly: Hail risk derived from NOAA SPC historical reports.
South Riding: Hail risk derived from NOAA SPC historical reports.
Storm surge
Chantilly: Unavailable · South Riding: Unavailable
A score difference cannot be calculated without both sources.
Chantilly: Storm surge model is not available for this location yet.
South Riding: Storm surge model is not available for this location yet.
Wildfire
Chantilly: 43/100 · South Riding: 42/100
Chantilly is 1 points higher.
Chantilly: Wildfire exposure derived from ingested fire potential tiles.
South Riding: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Chantilly: 40/100 · South Riding: 40/100
No gap.
Chantilly: Air quality signal derived from the latest EPA AirNow combined AQI grid.
South Riding: Air quality signal derived from the latest EPA AirNow combined AQI grid.