City vs city
Grass Valley vs Riverside, CA
Grass Valley currently scores 4 points higher overall than Riverside, 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 · Riverside: 32/100
Grass Valley is 4 points higher.
Flood
Grass Valley: 26/100 · Riverside: 43/100
Riverside is 17 points higher.
Grass Valley: FEMA NFHL flood zones: 2 features intersect this tile.
Riverside: FEMA NFHL flood zones: 23 features intersect this tile.
Wind
Grass Valley: 4/100 · Riverside: 5/100
Riverside is 1 points higher.
Grass Valley: Wind exposure derived from ingested design wind / climatology tiles.
Riverside: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grass Valley: 1/100 · Riverside: 2/100
Riverside is 1 points higher.
Grass Valley: Lightning exposure derived from ingested climatology tiles.
Riverside: Lightning exposure derived from ingested climatology tiles.
Tornado
Grass Valley: 0/100 · Riverside: 0/100
No gap.
Grass Valley: Tornado risk derived from NOAA SPC historical reports.
Riverside: Tornado risk derived from NOAA SPC historical reports.
Hail
Grass Valley: 3/100 · Riverside: 0/100
Grass Valley is 3 points higher.
Grass Valley: Hail risk derived from NOAA SPC historical reports.
Riverside: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grass Valley: Unavailable · Riverside: Unavailable
A score difference cannot be calculated without both sources.
Grass Valley: Storm surge model is not available for this location yet.
Riverside: Storm surge model is not available for this location yet.
Wildfire
Grass Valley: 84/100 · Riverside: 76/100
Grass Valley is 8 points higher.
Grass Valley: Wildfire exposure derived from ingested fire potential tiles.
Riverside: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Grass Valley: 100/100 · Riverside: 32/100
Grass Valley is 68 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.
Riverside: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.