City vs city
Grass Valley vs San Diego, CA
Grass Valley currently scores 14 points higher overall than San Diego, with the largest gap in ingested air quality.
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
Grass Valley: 36/100 · San Diego: 22/100
Grass Valley is 14 points higher.
Flood
Grass Valley: 26/100 · San Diego: 39/100
San Diego is 13 points higher.
Grass Valley: FEMA NFHL flood zones: 2 features intersect this tile.
San Diego: FEMA NFHL flood zones: 14 features intersect this tile.
Wind
Grass Valley: 4/100 · San Diego: 6/100
San Diego is 2 points higher.
Grass Valley: Wind exposure derived from ingested design wind / climatology tiles.
San Diego: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grass Valley: 1/100 · San Diego: 1/100
No gap.
Grass Valley: Lightning exposure derived from ingested climatology tiles.
San Diego: Lightning exposure derived from ingested climatology tiles.
Tornado
Grass Valley: 0/100 · San Diego: 12/100
San Diego is 12 points higher.
Grass Valley: Tornado risk derived from NOAA SPC historical reports.
San Diego: Tornado risk derived from NOAA SPC historical reports.
Hail
Grass Valley: 3/100 · San Diego: 5/100
San Diego is 2 points higher.
Grass Valley: Hail risk derived from NOAA SPC historical reports.
San Diego: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grass Valley: Unavailable · San Diego: Unavailable
A score difference cannot be calculated without both sources.
Grass Valley: Storm surge model is not available for this location yet.
San Diego: Storm surge model is not available for this location yet.
Wildfire
Grass Valley: 84/100 · San Diego: 69/100
Grass Valley is 15 points higher.
Grass Valley: Wildfire exposure derived from ingested fire potential tiles.
San Diego: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Grass Valley: 100/100 · San Diego: 24/100
Grass Valley is 76 points higher.
Grass Valley: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
San Diego: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.