Flood Zone Comparison
Compare key metrics between 21740 21740, MD — Zone AE and 52562 52562, IA — Zone AE. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 21740 21740, MD — Zone AE | 52562 52562, IA — Zone AE |
|---|---|---|
| name | 21740 21740, MD — Zone AE | 52562 52562, IA — Zone AE |
| zip code | 21740 | 52562 |
| city | 21740 | 52562 |
| state | Maryland | Iowa |
| state code | MD | IA |
| category | High Risk | High Risk |
| flood zone | Zone AE (High Risk — 100-Year Floodplain) | Zone AE (High Risk — 100-Year Floodplain) |
| risk level | High Risk | High Risk |
| annual flood prob | 1% annual chance (100-year flood) | 1% annual chance (100-year flood) |
| insurance required | Required for federally-backed mortgages | Required for federally-backed mortgages |
| avg annual premium | 3,285 | 3,285 |
| base flood elevation | 14 ft | 25 ft |
| historical floods | 3 recorded flood events in the past 50 years. Most recent major flood: 2010 | 5 recorded flood events in the past 50 years. Most recent major flood: 2014 |
| nearest water | Lake Superior (2.4 miles) | local creek (0.4 miles) |
| elevation ft | 196 | 1,073 |
| population | 33,412 | 64,320 |
| median home value | 359,630 | 638,043 |
| flood damage risk | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $15,980 | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $85,044 |
| mitigation tips | Elevate utilities above base flood elevation; install sump pumps with battery backup; consider flood-proofing ground floor; maintain flood insurance; create an emergency evacuation plan; store important documents above flood level. | Elevate utilities above base flood elevation; install sump pumps with battery backup; consider flood-proofing ground floor; maintain flood insurance; create an emergency evacuation plan; store important documents above flood level. |
| fema map id | 2001C348J | 4934C134J |
| last updated | 2025-01-01 | 2025-01-01 |
Our team analyzes data from FEMA National Flood Hazard Layer to deliver accurate, up-to-date information. All data is verified and cross-referenced with official sources.