| Absolute elevation above sea level in inches to parishes elevations above sea level in inches | Predicted year for the sea to rise | Elevation above sea level in feet |
| 584.25 | 2015.32 | 5 |
| 644.25 | 2022.634 | 10 |
| 704.25 | 2029.948 | 15 |
| 764.25 | 2037.262 | 20 |
| 824.25 | 2044.576 | 25 |
| 884.25 | 2051.89 | 30 |
| 1124.25 | 2081.146 | 50 |
| 1196.25 | 2089.923 | 56 |