City vs city
Santa Rosa Valley vs Simi Valley, CA
Simi Valley currently scores 2 points higher overall than Santa Rosa Valley, with the largest gap in wildfire.
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
Santa Rosa Valley: 24/100 · Simi Valley: 26/100
Simi Valley is 2 points higher.
Flood
Santa Rosa Valley: 38/100 · Simi Valley: 29/100
Santa Rosa Valley is 9 points higher.
Santa Rosa Valley: FEMA NFHL flood zones: 10 features intersect this tile.
Simi Valley: FEMA NFHL flood zones: 12 features intersect this tile.
Wind
Santa Rosa Valley: 3/100 · Simi Valley: 4/100
Simi Valley is 1 points higher.
Santa Rosa Valley: Wind exposure derived from ingested design wind / climatology tiles.
Simi Valley: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Santa Rosa Valley: 0/100 · Simi Valley: 0/100
No gap.
Santa Rosa Valley: Lightning exposure derived from ingested climatology tiles.
Simi Valley: Lightning exposure derived from ingested climatology tiles.
Tornado
Santa Rosa Valley: 0/100 · Simi Valley: 0/100
No gap.
Santa Rosa Valley: Tornado risk derived from NOAA SPC historical reports.
Simi Valley: Tornado risk derived from NOAA SPC historical reports.
Hail
Santa Rosa Valley: 0/100 · Simi Valley: 6/100
Simi Valley is 6 points higher.
Santa Rosa Valley: Hail risk derived from NOAA SPC historical reports.
Simi Valley: Hail risk derived from NOAA SPC historical reports.
Storm surge
Santa Rosa Valley: Unavailable · Simi Valley: Unavailable
A score difference cannot be calculated without both sources.
Santa Rosa Valley: Storm surge model is not available for this location yet.
Simi Valley: Storm surge model is not available for this location yet.
Wildfire
Santa Rosa Valley: 42/100 · Simi Valley: 72/100
Simi Valley is 30 points higher.
Santa Rosa Valley: Wildfire exposure derived from ingested fire potential tiles.
Simi Valley: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Santa Rosa Valley: 13/100 · Simi Valley: 17/100
Simi Valley is 4 points higher.
Santa Rosa 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.
Simi 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.