City vs city
Norwalk vs Old Hill, CT
Old Hill currently scores 18 points higher overall than Norwalk, 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
Norwalk: 26/100 · Old Hill: 44/100
Old Hill is 18 points higher.
Flood
Norwalk: 0/100 · Old Hill: 69/100
Old Hill is 69 points higher.
Norwalk: FEMA NFHL flood zones: 0 features intersect this tile.
Old Hill: FEMA NFHL flood zones: 13 features intersect this tile.
Wind
Norwalk: 25/100 · Old Hill: 26/100
Old Hill is 1 points higher.
Norwalk: Wind exposure derived from ingested design wind / climatology tiles.
Old Hill: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Norwalk: 17/100 · Old Hill: 16/100
Norwalk is 1 points higher.
Norwalk: Lightning exposure derived from ingested climatology tiles.
Old Hill: Lightning exposure derived from ingested climatology tiles.
Tornado
Norwalk: 15/100 · Old Hill: 0/100
Norwalk is 15 points higher.
Norwalk: Tornado risk derived from NOAA SPC historical reports.
Old Hill: Tornado risk derived from NOAA SPC historical reports.
Hail
Norwalk: 30/100 · Old Hill: 10/100
Norwalk is 20 points higher.
Norwalk: Hail risk derived from NOAA SPC historical reports.
Old Hill: Hail risk derived from NOAA SPC historical reports.
Storm surge
Norwalk: Unavailable · Old Hill: 76/100
A score difference cannot be calculated without both sources.
Norwalk: Storm surge model is not available for this location yet.
Old Hill: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Norwalk: 46/100 · Old Hill: 57/100
Old Hill is 11 points higher.
Norwalk: Wildfire exposure derived from ingested fire potential tiles.
Old Hill: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Norwalk: 51/100 · Old Hill: 51/100
No gap.
Norwalk: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Old Hill: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.