City vs city
Covina vs Diamond Bar, CA
Covina currently scores 1 points higher overall than Diamond Bar, with the largest gap in ingested air quality.
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
Covina: 21/100 · Diamond Bar: 20/100
Covina is 1 points higher.
Flood
Covina: 30/100 · Diamond Bar: 30/100
No gap.
Covina: FEMA NFHL flood zones: 7 features intersect this tile.
Diamond Bar: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Covina: 5/100 · Diamond Bar: 5/100
No gap.
Covina: Wind exposure derived from ingested design wind / climatology tiles.
Diamond Bar: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Covina: 1/100 · Diamond Bar: 1/100
No gap.
Covina: Lightning exposure derived from ingested climatology tiles.
Diamond Bar: Lightning exposure derived from ingested climatology tiles.
Tornado
Covina: 8/100 · Diamond Bar: 4/100
Covina is 4 points higher.
Covina: Tornado risk derived from NOAA SPC historical reports.
Diamond Bar: Tornado risk derived from NOAA SPC historical reports.
Hail
Covina: 6/100 · Diamond Bar: 1/100
Covina is 5 points higher.
Covina: Hail risk derived from NOAA SPC historical reports.
Diamond Bar: Hail risk derived from NOAA SPC historical reports.
Storm surge
Covina: Unavailable · Diamond Bar: Unavailable
A score difference cannot be calculated without both sources.
Covina: Storm surge model is not available for this location yet.
Diamond Bar: Storm surge model is not available for this location yet.
Wildfire
Covina: 76/100 · Diamond Bar: 73/100
Covina is 3 points higher.
Covina: Wildfire exposure derived from ingested fire potential tiles.
Diamond Bar: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Covina: 21/100 · Diamond Bar: 28/100
Diamond Bar is 7 points higher.
Covina: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
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.