City vs city
Palo Alto vs San Francisco, CA
Palo Alto and San Francisco are tied on overall score, with the biggest factor difference in flood.
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
Palo Alto: 25/100 · San Francisco: 25/100
No gap.
Flood
Palo Alto: 53/100 · San Francisco: 26/100
Palo Alto is 27 points higher.
Palo Alto: FEMA NFHL flood zones: 5 features intersect this tile.
San Francisco: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Palo Alto: 2/100 · San Francisco: 2/100
No gap.
Palo Alto: Wind exposure derived from ingested design wind / climatology tiles.
San Francisco: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Palo Alto: 0/100 · San Francisco: 0/100
No gap.
Palo Alto: Lightning exposure derived from ingested climatology tiles.
San Francisco: Lightning exposure derived from ingested climatology tiles.
Tornado
Palo Alto: 23/100 · San Francisco: 0/100
Palo Alto is 23 points higher.
Palo Alto: Tornado risk derived from NOAA SPC historical reports.
San Francisco: Tornado risk derived from NOAA SPC historical reports.
Hail
Palo Alto: 1/100 · San Francisco: 18/100
San Francisco is 17 points higher.
Palo Alto: Hail risk derived from NOAA SPC historical reports.
San Francisco: Hail risk derived from NOAA SPC historical reports.
Storm surge
Palo Alto: Unavailable · San Francisco: Unavailable
A score difference cannot be calculated without both sources.
Palo Alto: Storm surge model is not available for this location yet.
San Francisco: Storm surge model is not available for this location yet.
Wildfire
Palo Alto: 47/100 · San Francisco: 52/100
San Francisco is 5 points higher.
Palo Alto: Wildfire exposure derived from ingested fire potential tiles.
San Francisco: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Palo Alto: 23/100 · San Francisco: 25/100
San Francisco is 2 points higher.
Palo Alto: 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.