| Category | Loss of life | Economic Losses |
| Low | None expected (no human housing structure downstream) | Minimum (undeveloped area and occasional farming structures) |
| Significant | Up to 5 (no urban development and no more than a small number of habitable structures downstream) | Appreciable (farmlands, industries and structures) |
| High | More than 5 | Excessive (extensive communities, industries and agriculture) |