| Clue | Source | Date |
|---|---|---|
| Signs of drought | LA Times Daily | 09 Nov 2025 |
| Remnants of rivers | Wall Street Journal | 06 Feb 2021 |
| Signs of prolonged drought | LA Times Daily | 26 Jan 2016 |
| Signs of prolonged drought | ||
| Ditches where creeks once were | ||
| Ditches where creeks once were |