A roadway leads visitors to Hoover Dam. The dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. The white ''bathtub ring'' on the rocks is from mineral deposits left by higher levels of water. 11 Jun 2021 Pictured: Boaters are seen on Lake Mead on June 11, 2021 in the Lake Mead National Recreation Area, Nevada. The white ''bathtub ring'' on the rocks is from mineral deposits left by higher levels of water. A multi-year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Because the water at the lake, the largest man-made reservoir in North America, isn't being replenished as fast as it's being used, water managers are now working to come up with plans to combat the effects of continued population growth, drought and a dwindling supply of water from the Colorado River due to climate change. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

Lake Mead is seen off in the distance as motorists travel along Interstate 11. A multi-year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Because the water at the lake, the largest man-made reservoir in North America, isn't being replenished as fast as it's being used, water managers are now working to come up with plans to combat the effects of continued population growth, drought and a dwindling supply of water from the Colorado River due to climate change. 11 Jun 2021 Pictured: year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

Lake Mead is seen off in the distance as motorists travel along Interstate 11. A multi-year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Because the water at the lake, the largest man-made reservoir in North America, isn't being replenished as fast as it's being used, water managers are now working to come up with plans to combat the effects of continued population growth, drought and a dwindling supply of water from the Colorado River due to climate change. 11 Jun 2021 Pictured: year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

Lake Mead is seen off in the distance as motorists travel along Interstate 11. A multi-year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Because the water at the lake, the largest man-made reservoir in North America, isn't being replenished as fast as it's being used, water managers are now working to come up with plans to combat the effects of continued population growth, drought and a dwindling supply of water from the Colorado River due to climate change. 11 Jun 2021 Pictured: year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

Lake Mead is seen off in the distance as motorists travel along Interstate 11. A multi-year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Because the water at the lake, the largest man-made reservoir in North America, isn't being replenished as fast as it's being used, water managers are now working to come up with plans to combat the effects of continued population growth, drought and a dwindling supply of water from the Colorado River due to climate change. 11 Jun 2021 Pictured: Lake Mead is seen off in the distance as motorists travel along Interstate 11. A multi-year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Because the water at the lake, the largest man-made reservoir in North America, isn't being replenished as fast as it's being used, water managers are now working to come up with plans to combat the effects of continued population growth, drought and a dwindling supply of water from the Colorado River due to climate change. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

A roadway leads visitors to Hoover Dam. The dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. The white ''bathtub ring'' on the rocks is from mineral deposits left by higher levels of water. 11 Jun 2021 Pictured: A boat dock is seen along the banks of Lake Mead near Hoover Dam on June 11, 2021. Hoover Dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

A roadway leads visitors to Hoover Dam. The dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. The white ''bathtub ring'' on the rocks is from mineral deposits left by higher levels of water. 11 Jun 2021 Pictured: Boaters are seen on Lake Mead near Hoover Dam on June 11, 2021 in the Lake Mead National Recreation Area, Nevada. The white ''bathtub ring'' on the rocks is from mineral deposits left by higher levels of water. A multi-year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Because the water at the lake, the largest man-made reservoir in North America, isn't being replenished as fast as it's being used, water managers are now working to come up with plans to combat the effects of continued population growth, drought and a dwindling supply of water from the Colorado River due to climate change. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

A roadway leads visitors to Hoover Dam. The dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. The white ''bathtub ring'' on the rocks is from mineral deposits left by higher levels of water. 11 Jun 2021 Pictured: Hoover Dam is seen on the border between Arizona and Nevada. Hoover Dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

A roadway leads visitors to Hoover Dam. The dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. The white ''bathtub ring'' on the rocks is from mineral deposits left by higher levels of water. 11 Jun 2021 Pictured: (EDITORS NOTE: This image was shot with a fisheye lens.) A roadway leads visitors to Hoover Dam. The dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. The white ''bathtub ring'' on the rocks is from mineral deposits left by higher levels of water. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

A roadway leads visitors to Hoover Dam. The dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. The white ''bathtub ring'' on the rocks is from mineral deposits left by higher levels of water. 11 Jun 2021 Pictured: Hoover Dam is seen on the border between Arizona and Nevada. Hoover Dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

A roadway leads visitors to Hoover Dam. The dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. The white ''bathtub ring'' on the rocks is from mineral deposits left by higher levels of water. 11 Jun 2021 Pictured: A road way passes by Hoover Dam on the border between Arizona and Nevada. Hoover Dam, completed in 1936, impounds Lake Mead, the largest reservoir in the United States by volume. Almost the entire Southwest of the United States is mired in various stages of drought, resulting in falling water levels at the nation's two largest reservoirs, Lake Mead and Lake Powell. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. 11 Jun 2021 Pictured: year drought and increased water demand spurred by explosive population growth in the Southwest has caused the water level at Lake Mead, which supplies water to Las Vegas, Arizona and Southern California, to drop to its lowest in history. The National Park Service has been forced to close or extend boat launch ramps, and move entire marinas to try to keep up with the receding water levels. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342