City vs city
Merritt Island vs Port St. John, FL
Port St. John currently scores 5 points higher overall than Merritt Island, 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 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
Merritt Island: 41/100 · Port St. John: 46/100
Port St. John is 5 points higher.
Flood
Merritt Island: 40/100 · Port St. John: 51/100
Port St. John is 11 points higher.
Merritt Island: FEMA NFHL flood zones: 15 features intersect this tile.
Port St. John: FEMA NFHL flood zones: 12 features intersect this tile.
Wind
Merritt Island: 52/100 · Port St. John: 49/100
Merritt Island is 3 points higher.
Merritt Island: Wind exposure derived from ingested design wind / climatology tiles.
Port St. John: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Merritt Island: 91/100 · Port St. John: 98/100
Port St. John is 7 points higher.
Merritt Island: Lightning exposure derived from ingested climatology tiles.
Port St. John: Lightning exposure derived from ingested climatology tiles.
Tornado
Merritt Island: 15/100 · Port St. John: 4/100
Merritt Island is 11 points higher.
Merritt Island: Tornado risk derived from NOAA SPC historical reports.
Port St. John: Tornado risk derived from NOAA SPC historical reports.
Hail
Merritt Island: 13/100 · Port St. John: 27/100
Port St. John is 14 points higher.
Merritt Island: Hail risk derived from NOAA SPC historical reports.
Port St. John: Hail risk derived from NOAA SPC historical reports.
Storm surge
Merritt Island: 91/100 · Port St. John: Unavailable
A score difference cannot be calculated without both sources.
Merritt Island: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Port St. John: Storm surge model is not available for this location yet.
Wildfire
Merritt Island: 10/100 · Port St. John: 76/100
Port St. John is 66 points higher.
Merritt Island: Wildfire exposure derived from ingested fire potential tiles.
Port St. John: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Merritt Island: 16/100 · Port St. John: 16/100
No gap.
Merritt Island: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Port St. John: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.