City vs city
Charter Oak vs San Francisco, CA
San Francisco currently scores 5 points higher overall than Charter Oak, with the largest gap in wildfire.
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
Charter Oak: 20/100 · San Francisco: 25/100
San Francisco is 5 points higher.
Flood
Charter Oak: 29/100 · San Francisco: 26/100
Charter Oak is 3 points higher.
Charter Oak: FEMA NFHL flood zones: 4 features intersect this tile.
San Francisco: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Charter Oak: 5/100 · San Francisco: 2/100
Charter Oak is 3 points higher.
Charter Oak: Wind exposure derived from ingested design wind / climatology tiles.
San Francisco: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Charter Oak: 1/100 · San Francisco: 0/100
Charter Oak is 1 points higher.
Charter Oak: Lightning exposure derived from ingested climatology tiles.
San Francisco: Lightning exposure derived from ingested climatology tiles.
Tornado
Charter Oak: 8/100 · San Francisco: 0/100
Charter Oak is 8 points higher.
Charter Oak: Tornado risk derived from NOAA SPC historical reports.
San Francisco: Tornado risk derived from NOAA SPC historical reports.
Hail
Charter Oak: 2/100 · San Francisco: 18/100
San Francisco is 16 points higher.
Charter Oak: Hail risk derived from NOAA SPC historical reports.
San Francisco: Hail risk derived from NOAA SPC historical reports.
Storm surge
Charter Oak: Unavailable · San Francisco: Unavailable
A score difference cannot be calculated without both sources.
Charter Oak: Storm surge model is not available for this location yet.
San Francisco: Storm surge model is not available for this location yet.
Wildfire
Charter Oak: 78/100 · San Francisco: 52/100
Charter Oak is 26 points higher.
Charter Oak: Wildfire exposure derived from ingested fire potential tiles.
San Francisco: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Charter Oak: 20/100 · San Francisco: 25/100
San Francisco is 5 points higher.
Charter Oak: 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.