City vs city
Markham vs San Antonio, TX
San Antonio currently scores 2 points higher overall than Markham, with the largest gap in hail.
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
Markham: 43/100 · San Antonio: 45/100
San Antonio is 2 points higher.
Flood
Markham: 45/100 · San Antonio: 31/100
Markham is 14 points higher.
Markham: FEMA NFHL flood zones: 9 features intersect this tile.
San Antonio: FEMA NFHL flood zones: 14 features intersect this tile.
Wind
Markham: 48/100 · San Antonio: 16/100
Markham is 32 points higher.
Markham: Wind exposure derived from ingested design wind / climatology tiles.
San Antonio: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Markham: 47/100 · San Antonio: 44/100
Markham is 3 points higher.
Markham: Lightning exposure derived from ingested climatology tiles.
San Antonio: Lightning exposure derived from ingested climatology tiles.
Tornado
Markham: 27/100 · San Antonio: 42/100
San Antonio is 15 points higher.
Markham: Tornado risk derived from NOAA SPC historical reports.
San Antonio: Tornado risk derived from NOAA SPC historical reports.
Hail
Markham: 12/100 · San Antonio: 100/100
San Antonio is 88 points higher.
Markham: Hail risk derived from NOAA SPC historical reports.
San Antonio: Hail risk derived from NOAA SPC historical reports.
Storm surge
Markham: 99/100 · San Antonio: Unavailable
A score difference cannot be calculated without both sources.
Markham: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
San Antonio: Storm surge model is not available for this location yet.
Wildfire
Markham: 39/100 · San Antonio: 54/100
San Antonio is 15 points higher.
Markham: Wildfire exposure derived from ingested fire potential tiles.
San Antonio: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Markham: 30/100 · San Antonio: 26/100
Markham is 4 points higher.
Markham: 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 Antonio: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.