Lake Mead, on the Colorado River on the border of Nevada with Arizona, is the largest water reservoir in the USA. Located next to Las Vegas, it stores water for Arizona, southern California, southern Nevada and northern Mexico. Its major source of water is the Colorado River that brings water from melted snow that fell in Colorado, Utah, New Mexico, and Wyoming. However, due to the severe drought in the Colorado River Basin the lake continues to shrink over time.
The impact of the drought is visible on the Rock Island (Image 1) in the south end of the Boulder Basin. As satellite images show, receding water levels expose more land and only within a span of four years the Rock Island gets connected to the nearby Boulder Island.
Another change is visible on the Crescent Island (Image 2), a peninsula in the Las Vegas Bay at the western edge of the lake. While in June 2010 the Crescent Island appears to be smaller and covered with bits of vegetation, in September 2014 the peninsula seems to considerably expand and dry out, leaving no traces of previous vegetation on the surface.