City vs city
Discovery Bay vs San Francisco, CA
Discovery Bay 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
Discovery Bay: 25/100 · San Francisco: 25/100
No gap.
Flood
Discovery Bay: 51/100 · San Francisco: 26/100
Discovery Bay is 25 points higher.
Discovery Bay: FEMA NFHL flood zones: 10 features intersect this tile.
San Francisco: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Discovery Bay: 3/100 · San Francisco: 2/100
Discovery Bay is 1 points higher.
Discovery Bay: Wind exposure derived from ingested design wind / climatology tiles.
San Francisco: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Discovery Bay: 0/100 · San Francisco: 0/100
No gap.
Discovery Bay: Lightning exposure derived from ingested climatology tiles.
San Francisco: Lightning exposure derived from ingested climatology tiles.
Tornado
Discovery Bay: 4/100 · San Francisco: 0/100
Discovery Bay is 4 points higher.
Discovery Bay: Tornado risk derived from NOAA SPC historical reports.
San Francisco: Tornado risk derived from NOAA SPC historical reports.
Hail
Discovery Bay: 5/100 · San Francisco: 18/100
San Francisco is 13 points higher.
Discovery Bay: Hail risk derived from NOAA SPC historical reports.
San Francisco: Hail risk derived from NOAA SPC historical reports.
Storm surge
Discovery Bay: Unavailable · San Francisco: Unavailable
A score difference cannot be calculated without both sources.
Discovery Bay: Storm surge model is not available for this location yet.
San Francisco: Storm surge model is not available for this location yet.
Wildfire
Discovery Bay: 62/100 · San Francisco: 52/100
Discovery Bay is 10 points higher.
Discovery Bay: Wildfire exposure derived from ingested fire potential tiles.
San Francisco: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Discovery Bay: 26/100 · San Francisco: 25/100
Discovery Bay is 1 points higher.
Discovery Bay: 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.