Last week, Lake Mead dropped to the lowest levels since the reservoir was filled upon the completion of the Hoover Dam in the 1930s. The Southwest has remained in the grips of an everlasting drought for the past 14 years, forcing waters down more than 130 feet since a high-water mark was last reached in 2000. As entire marinas run dry, the Bureau of Reclamation fears that an ongoing drought could force the agency to declare a shortage by 2017, which could ultimately affect the more than 40 million people that rely on Lake Mead for water. Take a look at some startling photos of the nation's largest reservoir, now just 39 percent full, below. Photos via Huff Post (PHOTOS).