City vs city
Alum Rock vs San Francisco, CA
San Francisco currently scores 2 points higher overall than Alum Rock, 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
Alum Rock: 23/100 · San Francisco: 25/100
San Francisco is 2 points higher.
Flood
Alum Rock: 36/100 · San Francisco: 26/100
Alum Rock is 10 points higher.
Alum Rock: FEMA NFHL flood zones: 26 features intersect this tile.
San Francisco: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Alum Rock: 2/100 · San Francisco: 2/100
No gap.
Alum Rock: Wind exposure derived from ingested design wind / climatology tiles.
San Francisco: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Alum Rock: 0/100 · San Francisco: 0/100
No gap.
Alum Rock: Lightning exposure derived from ingested climatology tiles.
San Francisco: Lightning exposure derived from ingested climatology tiles.
Tornado
Alum Rock: 4/100 · San Francisco: 0/100
Alum Rock is 4 points higher.
Alum Rock: Tornado risk derived from NOAA SPC historical reports.
San Francisco: Tornado risk derived from NOAA SPC historical reports.
Hail
Alum Rock: 12/100 · San Francisco: 18/100
San Francisco is 6 points higher.
Alum Rock: Hail risk derived from NOAA SPC historical reports.
San Francisco: Hail risk derived from NOAA SPC historical reports.
Storm surge
Alum Rock: Unavailable · San Francisco: Unavailable
A score difference cannot be calculated without both sources.
Alum Rock: Storm surge model is not available for this location yet.
San Francisco: Storm surge model is not available for this location yet.
Wildfire
Alum Rock: 65/100 · San Francisco: 52/100
Alum Rock is 13 points higher.
Alum Rock: Wildfire exposure derived from ingested fire potential tiles.
San Francisco: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Alum Rock: 20/100 · San Francisco: 25/100
San Francisco is 5 points higher.
Alum Rock: 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.