City vs city
Diamond Bar vs South San Jose Hills, CA
South San Jose Hills currently scores 4 points higher overall than Diamond Bar, 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
Diamond Bar: 20/100 · South San Jose Hills: 24/100
South San Jose Hills is 4 points higher.
Flood
Diamond Bar: 30/100 · South San Jose Hills: 36/100
South San Jose Hills is 6 points higher.
Diamond Bar: FEMA NFHL flood zones: 4 features intersect this tile.
South San Jose Hills: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Diamond Bar: 5/100 · South San Jose Hills: 5/100
No gap.
Diamond Bar: Wind exposure derived from ingested design wind / climatology tiles.
South San Jose Hills: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Diamond Bar: 1/100 · South San Jose Hills: 1/100
No gap.
Diamond Bar: Lightning exposure derived from ingested climatology tiles.
South San Jose Hills: Lightning exposure derived from ingested climatology tiles.
Tornado
Diamond Bar: 4/100 · South San Jose Hills: 0/100
Diamond Bar is 4 points higher.
Diamond Bar: Tornado risk derived from NOAA SPC historical reports.
South San Jose Hills: Tornado risk derived from NOAA SPC historical reports.
Hail
Diamond Bar: 1/100 · South San Jose Hills: 1/100
No gap.
Diamond Bar: Hail risk derived from NOAA SPC historical reports.
South San Jose Hills: Hail risk derived from NOAA SPC historical reports.
Storm surge
Diamond Bar: Unavailable · South San Jose Hills: Unavailable
A score difference cannot be calculated without both sources.
Diamond Bar: Storm surge model is not available for this location yet.
South San Jose Hills: Storm surge model is not available for this location yet.
Wildfire
Diamond Bar: 73/100 · South San Jose Hills: 75/100
South San Jose Hills is 2 points higher.
Diamond Bar: Wildfire exposure derived from ingested fire potential tiles.
South San Jose Hills: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Diamond Bar: 28/100 · South San Jose Hills: 26/100
Diamond Bar is 2 points higher.
Diamond Bar: 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 Jose 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.