City vs city
Perris vs San Francisco, CA
Perris currently scores 5 points higher overall than San Francisco, 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
Perris: 24/100 · San Francisco: 19/100
Perris is 5 points higher.
Flood
Perris: 38/100 · San Francisco: 56/100
San Francisco is 18 points higher.
Perris: FEMA NFHL flood zones: 10 features intersect this tile.
San Francisco: FEMA NFHL flood zones: 16 features intersect this tile.
Wind
Perris: 5/100 · San Francisco: 2/100
Perris is 3 points higher.
Perris: Wind exposure derived from ingested design wind / climatology tiles.
San Francisco: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Perris: 2/100 · San Francisco: 0/100
Perris is 2 points higher.
Perris: Lightning exposure derived from ingested climatology tiles.
San Francisco: Lightning exposure derived from ingested climatology tiles.
Tornado
Perris: 12/100 · San Francisco: 0/100
Perris is 12 points higher.
Perris: Tornado risk derived from NOAA SPC historical reports.
San Francisco: Tornado risk derived from NOAA SPC historical reports.
Hail
Perris: 3/100 · San Francisco: 3/100
No gap.
Perris: Hail risk derived from NOAA SPC historical reports.
San Francisco: Hail risk derived from NOAA SPC historical reports.
Storm surge
Perris: Unavailable · San Francisco: Unavailable
A score difference cannot be calculated without both sources.
Perris: Storm surge model is not available for this location yet.
San Francisco: Storm surge model is not available for this location yet.
Wildfire
Perris: 83/100 · San Francisco: 8/100
Perris is 75 points higher.
Perris: Wildfire exposure derived from ingested fire potential tiles.
San Francisco: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Perris: 27/100 · San Francisco: 25/100
Perris is 2 points higher.
Perris: 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 Francisco: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.