In this before-and-after composite image, above, the Enterprise Bridge passes over full water levels at a section of Lake Oroville on July 20, 2011 in Oroville, Calif. The Enterprise Bridge, below, passes over a section of Lake Oroville that is nearly dry on Aug. 19, 2014 in Oroville, Calif. As the severe drought in Calif. continues for a third straight year, water levels in the State's lakes and reservoirs is reaching historic lows. Folsom Lake is currently at 40 percent of its total capacity of 977,000 acre feet. Paul Hames/California Department of Water Resources via Getty Images|Justin Sullivan/Getty Images

In this before-and-after composite image, above, full water levels are visible behind the Folsom Dam at Folsom Lake on July 20, 2011 in El Folsom, Calif. Low water levels are visible behind the Folsom Dam, below, at Folsom Lake on Aug. 19, 2014 in El Folsom, Calif. Paul Hames/California Department of Water Resources via Getty Images|Justin Sullivan/Getty Images

In this before-and-after composite image, above, full water levels are visible in the Bidwell Marina at Lake Oroville on July 20, 2011 in Oroville, Calif. Low water levels are visible in the Bidwell Marina, below, at Lake Oroville on Aug. 19, 2014 in Oroville, Calif. Paul Hames/California Department of Water Resources via Getty Images|Justin Sullivan/Getty Images

In this before-and-after composite image, above, full water levels are visible behind the Oroville Dam at Lake Oroville on July 20, 2011 in Oroville, Calif. Low water levels are visible behind the Oroville Dam, below, at Lake Oroville on Aug. 19, 2014 in Oroville, Calif. Paul Hames/California Department of Water Resources via Getty Images|Justin Sullivan/Getty Images

In this before-and-after composite image, above, the Green Bridge passes over full water levels at a section of Lake Oroville near the Bidwell Marina on July 20, 2011 in Oroville, Calif. The Green Bridge passes over low water levels at a section of Lake Oroville, below, near the Bidwell Marina on Aug. 19, 2014 in Oroville, Calif. Paul Hames/California Department of Water Resources via Getty Images|Justin Sullivan/Getty Images

In this before-and-after composite image, above, the Enterprise Bridge passes over full water levels at a section of Lake Oroville near the Bidwell Marina on July 20, 2011 in Oroville, Calif. The Enterprise Bridge passes over a section of Lake Oroville, below, that is nearly dry on August 19, 2014 in Oroville, Calif. Paul Hames/California Department of Water Resources via Getty Images|Justin Sullivan/Getty Images

In this before-and-after composite image, above, full water levels are visible in the Bidwell Marina at Lake Oroville on July 20, 2011 in Oroville, Calif. Low water levels are visible in the Bidwell Marina, below, at Lake Oroville on Aug, 19, 2014 in Oroville, Calif. Paul Hames/California Department of Water Resources via Getty Images|Justin Sullivan/Getty Images

In this before-and-after composite image, above, full water levels are visible in the Bidwell Marina at Lake Oroville on on July 20, 2011 in Oroville, Calif. Low water levels are visible in the Bidwell Marina, below, at Lake Oroville on Aug. 19, 2014 in Oroville, Calif. Paul Hames/California Department of Water Resources via Getty Images|Justin Sullivan/Getty Images