LAKE MEAD NATIONAL RECREATION AREA, NEVADA - JUNE 21: A sign at Callville Bay warns boaters of low water levels as visitors prepare to launch a boat on June 21, 2021 in the Lake Mead National Recreation Area, Nevada. The U.S. Bureau of Reclamation reported that Lake Mead, North America's largest artificial reservoir, dropped to just over 1,070 feet above sea level over the weekend, the lowest it's been since being filled in 1937 after the construction of the Hoover Dam. As a result of low lake levels, the National Park Service has had to close some boat launch ramps and use pipe mats to extend others temporarily. The declining water levels are a result of a nearly continuous drought for the past two decades coupled with increased water demands in the Southwestern United States. The drought has left a white "bathtub ring" of mineral deposits left by higher water levels on the rocks around the lake. (Photo by Ethan Miller/Getty Images)

LAS VEGAS (AP) — Las Vegas police believe a body found inside a barrel on the newly exposed bottom of Lake Mead is that of a man who had been shot. Homicide Lt. Ray Spencer also said Tuesday that shoes worn by the man were manufactured in the middle and late 1970s, indicating that the killing likely occurred between the middle 1970s and early 1980s. Police previously said the remains spotted Sunday by boaters probably dated from the 1980s. Drought has dropped the water level of Lake Mead on the Colorado River in southern Nevada and northern Arizona so much that the uppermost water intake at drought-stricken Lake Mead became visible last week.