City vs city
Mill Valley vs San Francisco, CA
Mill Valley 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
Mill Valley: 25/100 · San Francisco: 25/100
No gap.
Flood
Mill Valley: 40/100 · San Francisco: 26/100
Mill Valley is 14 points higher.
Mill Valley: FEMA NFHL flood zones: 13 features intersect this tile.
San Francisco: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Mill Valley: 2/100 · San Francisco: 2/100
No gap.
Mill Valley: Wind exposure derived from ingested design wind / climatology tiles.
San Francisco: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Mill Valley: 0/100 · San Francisco: 0/100
No gap.
Mill Valley: Lightning exposure derived from ingested climatology tiles.
San Francisco: Lightning exposure derived from ingested climatology tiles.
Tornado
Mill Valley: 0/100 · San Francisco: 0/100
No gap.
Mill Valley: Tornado risk derived from NOAA SPC historical reports.
San Francisco: Tornado risk derived from NOAA SPC historical reports.
Hail
Mill Valley: 5/100 · San Francisco: 18/100
San Francisco is 13 points higher.
Mill Valley: Hail risk derived from NOAA SPC historical reports.
San Francisco: Hail risk derived from NOAA SPC historical reports.
Storm surge
Mill Valley: Unavailable · San Francisco: Unavailable
A score difference cannot be calculated without both sources.
Mill Valley: Storm surge model is not available for this location yet.
San Francisco: Storm surge model is not available for this location yet.
Wildfire
Mill Valley: 51/100 · San Francisco: 52/100
San Francisco is 1 points higher.
Mill Valley: Wildfire exposure derived from ingested fire potential tiles.
San Francisco: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Mill Valley: 26/100 · San Francisco: 25/100
Mill Valley is 1 points higher.
Mill 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.
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.