Flood Zone Comparison
Compare key metrics between 20637 20637, MD — Zone A and 38059 38059, TN — Zone A. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 20637 20637, MD — Zone A | 38059 38059, TN — Zone A |
|---|---|---|
| name | 20637 20637, MD — Zone A | 38059 38059, TN — Zone A |
| zip code | 20637 | 38059 |
| city | 20637 | 38059 |
| state | Maryland | Tennessee |
| state code | MD | TN |
| category | High Risk | High Risk |
| flood zone | Zone A (High Risk — 100-Year Floodplain, No BFE) | Zone A (High Risk — 100-Year Floodplain, No BFE) |
| 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 | 1,712 | 1,712 |
| base flood elevation | 24 ft | 12 ft |
| historical floods | 0 recorded flood events in the past 50 years | 1 recorded flood events in the past 50 years. Most recent major flood: 2005 |
| nearest water | Galveston Bay (3.0 miles) | Rio Grande (2.0 miles) |
| elevation ft | 426 | 1,562 |
| population | 47,047 | 9,906 |
| median home value | 703,825 | 416,914 |
| flood damage risk | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $99,827 | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $147,790 |
| 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 | 1473C717J | 6776C382J |
| 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.