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US Drought Monitor, published weekly · current map Oct 20, 2026 · alongside statewide reservoir storage
Texas reservoirs hold 72.1% of conservation capacity — below 66% of years on this date since 1933. Storage was last this low in 2024.
TWDB has aggregated statewide storage daily since Jul 1, 1933. The record low for this date is 0.3% in 1933; the record high is 99.1% in 1936.
Statewide reservoir storage over US Drought Monitor coverage
Statewide reservoir storageShare of Texas in drought, by severityBoth on the same 0–100% axis. Storage typically lags drought by months.
Share of Texas in each US Drought Monitor category, weekly
Bands are exclusive shares — the API reports cumulative coverage, where D1 already includes D2 through D4.
Ranked by the drought severity where the reservoir sits, not by how full it is
| Reservoir | County | Drought | DSCI | % Full |
|---|---|---|---|---|
| Caddo Lake | Harrison | D3 Extreme drought | 400 | 47.5% |
| Monticello Reservoir | Titus | D3 Extreme drought | 400 | 71.7% |
| Lake Crook | Lamar | D3 Extreme drought | 400 | 82.5% |
| Lake Bob Sandlin | Titus | D3 Extreme drought | 400 | 87.3% |
| Lake Cypress Springs | Franklin | D3 Extreme drought | 400 | 88.1% |
| Pat Mayse Lake | Lamar | D3 Extreme drought | 400 | 89.0% |
| Lake O the Pines | Marion | D3 Extreme drought | 400 | 90.3% |
| Wright Patman Lake | Bowie | D3 Extreme drought | 400 | 100.0% |
| Mackenzie Reservoir | Briscoe | D3 Extreme drought | 396 | 10.8% |
| Murvaul Lake | Panola | D3 Extreme drought | 356 | 86.8% |
| North Fork Buffalo Creek Reservoir | Wichita | D4 Exceptional drought | 352 | 76.0% |
| Cooper (Chapman) Lake | Hopkins | D3 Extreme drought | 351 | 64.8% |
Drought where a reservoir sits does not by itself explain its level: most reservoirs are filled by a watershed reaching far upstream, and releases are managed. Treat this as context, not causation.
By Drought Severity and Coverage Index (0–500)
Drought data from the US Drought Monitor, a joint product of NDMC, USDA and NOAA. See the statewide map for the county overlay.