Overview
- This week Lake Mead sank to about 1,040.3–1,040.5 feet above sea level, the lowest recorded elevation since the reservoir was filled in the 1930s, according to U.S. Bureau of Reclamation data.
- The lake is now within roughly five feet of the roughly 1,035‑foot threshold where Hoover Dam turbines must be shut down and the dam’s power output would fall sharply.
- In early August the Department of the Interior proposed an operational framework that could require Lower Basin states to cut water use by up to about 3 million acre‑feet cumulatively through 2036 and includes emergency transfers and paid conservation actions.
- Local water managers are already planning reductions and adjustments: Southern Nevada expects cuts to its Colorado River allocation in 2027 and 2028 while some state leaders have publicly objected to the federal proposal.
- The decline reflects decades of over‑allocation plus a multiyear drought and an exceptionally warm winter with record‑low snowpack, and Lake Powell and several other Western reservoirs are also at multi‑decade lows, putting roughly 30–40 million people who rely on the basin at increased risk.