City vs city
Castro Valley vs San Ramon, CA
San Ramon currently scores 3 points higher overall than Castro Valley, 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
Castro Valley: 24/100 · San Ramon: 27/100
San Ramon is 3 points higher.
Flood
Castro Valley: 26/100 · San Ramon: 33/100
San Ramon is 7 points higher.
Castro Valley: FEMA NFHL flood zones: 4 features intersect this tile.
San Ramon: FEMA NFHL flood zones: 14 features intersect this tile.
Wind
Castro Valley: 2/100 · San Ramon: 2/100
No gap.
Castro Valley: Wind exposure derived from ingested design wind / climatology tiles.
San Ramon: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Castro Valley: 0/100 · San Ramon: 0/100
No gap.
Castro Valley: Lightning exposure derived from ingested climatology tiles.
San Ramon: Lightning exposure derived from ingested climatology tiles.
Tornado
Castro Valley: 0/100 · San Ramon: 0/100
No gap.
Castro Valley: Tornado risk derived from NOAA SPC historical reports.
San Ramon: Tornado risk derived from NOAA SPC historical reports.
Hail
Castro Valley: 1/100 · San Ramon: 4/100
San Ramon is 3 points higher.
Castro Valley: Hail risk derived from NOAA SPC historical reports.
San Ramon: Hail risk derived from NOAA SPC historical reports.
Storm surge
Castro Valley: Unavailable · San Ramon: Unavailable
A score difference cannot be calculated without both sources.
Castro Valley: Storm surge model is not available for this location yet.
San Ramon: Storm surge model is not available for this location yet.
Wildfire
Castro Valley: 67/100 · San Ramon: 73/100
San Ramon is 6 points higher.
Castro Valley: Wildfire exposure derived from ingested fire potential tiles.
San Ramon: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Castro Valley: 24/100 · San Ramon: 24/100
No gap.
Castro Valley: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
San Ramon: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.