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