City vs city
San Francisco vs Walnut Grove, CA
Walnut Grove currently scores 12 points higher overall than 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
San Francisco: 25/100 · Walnut Grove: 37/100
Walnut Grove is 12 points higher.
Flood
San Francisco: 26/100 · Walnut Grove: 99/100
Walnut Grove is 73 points higher.
San Francisco: FEMA NFHL flood zones: 4 features intersect this tile.
Walnut Grove: FEMA NFHL flood zones: 11 features intersect this tile.
Wind
San Francisco: 2/100 · Walnut Grove: 3/100
Walnut Grove is 1 points higher.
San Francisco: Wind exposure derived from ingested design wind / climatology tiles.
Walnut Grove: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
San Francisco: 0/100 · Walnut Grove: 0/100
No gap.
San Francisco: Lightning exposure derived from ingested climatology tiles.
Walnut Grove: Lightning exposure derived from ingested climatology tiles.
Tornado
San Francisco: 0/100 · Walnut Grove: 4/100
Walnut Grove is 4 points higher.
San Francisco: Tornado risk derived from NOAA SPC historical reports.
Walnut Grove: Tornado risk derived from NOAA SPC historical reports.
Hail
San Francisco: 18/100 · Walnut Grove: 0/100
San Francisco is 18 points higher.
San Francisco: Hail risk derived from NOAA SPC historical reports.
Walnut Grove: Hail risk derived from NOAA SPC historical reports.
Storm surge
San Francisco: Unavailable · Walnut Grove: Unavailable
A score difference cannot be calculated without both sources.
San Francisco: Storm surge model is not available for this location yet.
Walnut Grove: Storm surge model is not available for this location yet.
Wildfire
San Francisco: 52/100 · Walnut Grove: 58/100
Walnut Grove is 6 points higher.
San Francisco: Wildfire exposure derived from ingested fire potential tiles.
Walnut Grove: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
San Francisco: 25/100 · Walnut Grove: 20/100
San Francisco is 5 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.
Walnut Grove: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.