Flood Zone Comparison
Compare key metrics between 57792 57792, SD — Zone A and 93638 93638, CA — Zone D. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 57792 57792, SD — Zone A | 93638 93638, CA — Zone D |
|---|---|---|
| name | 57792 57792, SD — Zone A | 93638 93638, CA — Zone D |
| zip code | 57792 | 93638 |
| city | 57792 | 93638 |
| state | South Dakota | California |
| state code | SD | CA |
| category | High Risk | Undetermined |
| flood zone | Zone A (High Risk — 100-Year Floodplain, No BFE) | Zone D (Undetermined Risk — No Analysis Performed) |
| risk level | High Risk | Undetermined |
| annual flood prob | 1% annual chance (100-year flood) | Unknown — flood risk not yet determined by FEMA |
| insurance required | Required for federally-backed mortgages | Recommended — risk is undetermined |
| avg annual premium | 1,158 | 1,158 |
| base flood elevation | 7 ft | N/A — not in Special Flood Hazard Area |
| historical floods | 13 recorded flood events in the past 50 years. Most recent major flood: 2008 | 9 recorded flood events in the past 50 years. Most recent major flood: 2011 |
| nearest water | Rio Grande (3.9 miles) | local stream (4.2 miles) |
| elevation ft | 868 | 64 |
| population | 65,957 | 78,635 |
| median home value | 635,020 | 160,534 |
| flood damage risk | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $26,605 | Unknown chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $97,523 |
| 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. | Purchase flood insurance as a precaution; research historical flooding in your area; contact your local floodplain administrator; maintain proper drainage; prepare an emergency kit and evacuation plan. |
| fema map id | 7532C957J | 5486C917J |
| 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.