City vs city
Grundy Center vs Marshalltown, IA
Marshalltown currently scores 21 points higher overall than Grundy Center, with the largest gap in tornado.
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
Grundy Center: 34/100 · Marshalltown: 55/100
Marshalltown is 21 points higher.
Flood
Grundy Center: 46/100 · Marshalltown: 81/100
Marshalltown is 35 points higher.
Grundy Center: FEMA NFHL flood zones: 3 features intersect this tile.
Marshalltown: FEMA NFHL flood zones: 11 features intersect this tile.
Wind
Grundy Center: 18/100 · Marshalltown: 18/100
No gap.
Grundy Center: Wind exposure derived from ingested design wind / climatology tiles.
Marshalltown: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grundy Center: 31/100 · Marshalltown: 45/100
Marshalltown is 14 points higher.
Grundy Center: Lightning exposure derived from ingested climatology tiles.
Marshalltown: Lightning exposure derived from ingested climatology tiles.
Tornado
Grundy Center: 19/100 · Marshalltown: 81/100
Marshalltown is 62 points higher.
Grundy Center: Tornado risk derived from NOAA SPC historical reports.
Marshalltown: Tornado risk derived from NOAA SPC historical reports.
Hail
Grundy Center: 68/100 · Marshalltown: 100/100
Marshalltown is 32 points higher.
Grundy Center: Hail risk derived from NOAA SPC historical reports.
Marshalltown: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grundy Center: Unavailable · Marshalltown: Unavailable
A score difference cannot be calculated without both sources.
Grundy Center: Storm surge model is not available for this location yet.
Marshalltown: Storm surge model is not available for this location yet.
Wildfire
Grundy Center: 36/100 · Marshalltown: 33/100
Grundy Center is 3 points higher.
Grundy Center: Wildfire exposure derived from ingested fire potential tiles.
Marshalltown: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Grundy Center: 22/100 · Marshalltown: 28/100
Marshalltown is 6 points higher.
Grundy Center: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Marshalltown: Air quality signal derived from the latest EPA AirNow combined AQI grid.