City vs city
Los Altos Hills vs Sunnyvale, CA
Sunnyvale currently scores 4 points higher overall than Los Altos Hills, 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
Los Altos Hills: 25/100 · Sunnyvale: 29/100
Sunnyvale is 4 points higher.
Flood
Los Altos Hills: 53/100 · Sunnyvale: 52/100
Los Altos Hills is 1 points higher.
Los Altos Hills: FEMA NFHL flood zones: 5 features intersect this tile.
Sunnyvale: FEMA NFHL flood zones: 16 features intersect this tile.
Wind
Los Altos Hills: 2/100 · Sunnyvale: 2/100
No gap.
Los Altos Hills: Wind exposure derived from ingested design wind / climatology tiles.
Sunnyvale: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Los Altos Hills: 0/100 · Sunnyvale: 0/100
No gap.
Los Altos Hills: Lightning exposure derived from ingested climatology tiles.
Sunnyvale: Lightning exposure derived from ingested climatology tiles.
Tornado
Los Altos Hills: 23/100 · Sunnyvale: 19/100
Los Altos Hills is 4 points higher.
Los Altos Hills: Tornado risk derived from NOAA SPC historical reports.
Sunnyvale: Tornado risk derived from NOAA SPC historical reports.
Hail
Los Altos Hills: 1/100 · Sunnyvale: 11/100
Sunnyvale is 10 points higher.
Los Altos Hills: Hail risk derived from NOAA SPC historical reports.
Sunnyvale: Hail risk derived from NOAA SPC historical reports.
Storm surge
Los Altos Hills: Unavailable · Sunnyvale: Unavailable
A score difference cannot be calculated without both sources.
Los Altos Hills: Storm surge model is not available for this location yet.
Sunnyvale: Storm surge model is not available for this location yet.
Wildfire
Los Altos Hills: 47/100 · Sunnyvale: 63/100
Sunnyvale is 16 points higher.
Los Altos Hills: Wildfire exposure derived from ingested fire potential tiles.
Sunnyvale: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Los Altos Hills: 23/100 · Sunnyvale: 26/100
Sunnyvale is 3 points higher.
Los Altos Hills: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Sunnyvale: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.