A formerly sunken boat sits high and dry along the shoreline of Lake Mead at the Lake Mead National Recreation Area, on May 10, near Boulder City, Nev. John Locher/AP hide caption
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Since May, authorities have now uncovered four sets of human remains at Lake Mead, as the country's largest reservoir deals with extremely low water levels. Frederic J. Brown/AFP via Getty Images hide caption
Lines mark previous water levels at the Hoover Dam on Lake Mead in Boulder City, Nevada, U.S., on Wednesday, June 16, 2021. The reservoir level at the Hoover Dam has plunged to its lowest since it was first filled in the 1930s. Bloomberg/Bloomberg via Getty Images hide caption
What If The Drought Doesn't End? 'The Water Knife' Is One Possibility
Lake Mead is at its lowest levels since it was built in the late 1930s. Kirk Siegler/NPR hide caption