City vs city
Foster City vs South San Francisco, CA
Foster City currently scores 7 points higher overall than South San Francisco, with the largest gap 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
Foster City: 28/100 · South San Francisco: 21/100
Foster City is 7 points higher.
Flood
Foster City: 56/100 · South San Francisco: 31/100
Foster City is 25 points higher.
Foster City: FEMA NFHL flood zones: 21 features intersect this tile.
South San Francisco: FEMA NFHL flood zones: 9 features intersect this tile.
Wind
Foster City: 2/100 · South San Francisco: 2/100
No gap.
Foster City: Wind exposure derived from ingested design wind / climatology tiles.
South San Francisco: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Foster City: 0/100 · South San Francisco: 0/100
No gap.
Foster City: Lightning exposure derived from ingested climatology tiles.
South San Francisco: Lightning exposure derived from ingested climatology tiles.
Tornado
Foster City: 0/100 · South San Francisco: 8/100
South San Francisco is 8 points higher.
Foster City: Tornado risk derived from NOAA SPC historical reports.
South San Francisco: Tornado risk derived from NOAA SPC historical reports.
Hail
Foster City: 5/100 · South San Francisco: 5/100
No gap.
Foster City: Hail risk derived from NOAA SPC historical reports.
South San Francisco: Hail risk derived from NOAA SPC historical reports.
Storm surge
Foster City: Unavailable · South San Francisco: Unavailable
A score difference cannot be calculated without both sources.
Foster City: Storm surge model is not available for this location yet.
South San Francisco: Storm surge model is not available for this location yet.
Wildfire
Foster City: 53/100 · South San Francisco: 54/100
South San Francisco is 1 points higher.
Foster City: Wildfire exposure derived from ingested fire potential tiles.
South San Francisco: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Foster City: 22/100 · South San Francisco: 25/100
South San Francisco is 3 points higher.
Foster City: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
South 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.