City vs city
Atherton vs Palo Alto, CA
Palo Alto currently scores 2 points higher overall than Atherton, with the largest gap in tornado.
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
Atherton: 23/100 · Palo Alto: 25/100
Palo Alto is 2 points higher.
Flood
Atherton: 34/100 · Palo Alto: 53/100
Palo Alto is 19 points higher.
Atherton: FEMA NFHL flood zones: 10 features intersect this tile.
Palo Alto: FEMA NFHL flood zones: 5 features intersect this tile.
Wind
Atherton: 2/100 · Palo Alto: 2/100
No gap.
Atherton: Wind exposure derived from ingested design wind / climatology tiles.
Palo Alto: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Atherton: 0/100 · Palo Alto: 0/100
No gap.
Atherton: Lightning exposure derived from ingested climatology tiles.
Palo Alto: Lightning exposure derived from ingested climatology tiles.
Tornado
Atherton: 0/100 · Palo Alto: 23/100
Palo Alto is 23 points higher.
Atherton: Tornado risk derived from NOAA SPC historical reports.
Palo Alto: Tornado risk derived from NOAA SPC historical reports.
Hail
Atherton: 3/100 · Palo Alto: 1/100
Atherton is 2 points higher.
Atherton: Hail risk derived from NOAA SPC historical reports.
Palo Alto: Hail risk derived from NOAA SPC historical reports.
Storm surge
Atherton: Unavailable · Palo Alto: Unavailable
A score difference cannot be calculated without both sources.
Atherton: Storm surge model is not available for this location yet.
Palo Alto: Storm surge model is not available for this location yet.
Wildfire
Atherton: 56/100 · Palo Alto: 47/100
Atherton is 9 points higher.
Atherton: Wildfire exposure derived from ingested fire potential tiles.
Palo Alto: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Atherton: 22/100 · Palo Alto: 23/100
Palo Alto is 1 points higher.
Atherton: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Palo Alto: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.