Flood Zone Comparison
Compare key metrics between 57657 57657, SD — Zone AE and 63648 63648, MO — Zone AE. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 57657 57657, SD — Zone AE | 63648 63648, MO — Zone AE |
|---|---|---|
| name | 57657 57657, SD — Zone AE | 63648 63648, MO — Zone AE |
| zip code | 57657 | 63648 |
| city | 57657 | 63648 |
| state | South Dakota | Missouri |
| state code | SD | MO |
| 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 | 3,002 | 3,002 |
| base flood elevation | 9 ft | 15 ft |
| historical floods | 1 recorded flood events in the past 50 years. Most recent major flood: 2022 | 11 recorded flood events in the past 50 years. Most recent major flood: 2011 |
| nearest water | Hudson River (4.9 miles) | Lake Huron (2.2 miles) |
| elevation ft | 1,211 | 858 |
| population | 77,538 | 70,136 |
| median home value | 132,297 | 368,624 |
| flood damage risk | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $88,744 | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $28,737 |
| 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 | 8512C773J | 2878C581J |
| 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.