City vs city
Ontario vs San Francisco, CA
Ontario currently scores 7 points higher overall than San Francisco, 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 is a current EPA AirNow signal; 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
Ontario: 32/100 · San Francisco: 25/100
Ontario is 7 points higher.
Flood
Ontario: 41/100 · San Francisco: 26/100
Ontario is 15 points higher.
Ontario: FEMA NFHL flood zones: 14 features intersect this tile.
San Francisco: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Ontario: 5/100 · San Francisco: 2/100
Ontario is 3 points higher.
Ontario: Wind exposure derived from ingested design wind / climatology tiles.
San Francisco: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Ontario: 1/100 · San Francisco: 0/100
Ontario is 1 points higher.
Ontario: Lightning exposure derived from ingested climatology tiles.
San Francisco: Lightning exposure derived from ingested climatology tiles.
Tornado
Ontario: 0/100 · San Francisco: 0/100
No gap.
Ontario: Tornado risk derived from NOAA SPC historical reports.
San Francisco: Tornado risk derived from NOAA SPC historical reports.
Hail
Ontario: 0/100 · San Francisco: 18/100
San Francisco is 18 points higher.
Ontario: Hail risk derived from NOAA SPC historical reports.
San Francisco: Hail risk derived from NOAA SPC historical reports.
Storm surge
Ontario: Unavailable · San Francisco: Unavailable
A score difference cannot be calculated without both sources.
Ontario: Storm surge model is not available for this location yet.
San Francisco: Storm surge model is not available for this location yet.
Wildfire
Ontario: 80/100 · San Francisco: 52/100
Ontario is 28 points higher.
Ontario: Wildfire exposure derived from ingested fire potential tiles.
San Francisco: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Ontario: 31/100 · San Francisco: 25/100
Ontario is 6 points higher.
Ontario: Air quality signal derived from the latest EPA AirNow combined AQI grid.
San Francisco: Air quality signal derived from the latest EPA AirNow combined AQI grid.