Southwest braces as Lake Mead water levels drop - Article Photos 1/11

In this July 28, 2014 photo, lightning strikes over Lake Mead near Hoover Dam at the Lake Mead National Recreation Area in Arizona. On the left are the Arizona intake towers of Hoover Dam. The bathtub ring of light minerals shows the high water mark of the reservoir which has shrunk to its lowest point since it was first filled in the 1930s. (AP Photo/John Locher)