Authorities said Sunday that more human remains were found in the Lake Mead National Recreation Area east of Las Vegas. This area has been hit hard by drought.
It's the fourth time since May that bones have been found because of the drought in the West, which has caused the shoreline of the Colorado River reservoir behind Hoover Dam to recede.
Officials from the National Park Service said that rangers were sent to the reservoir between Nevada and Arizona at 11 a.m. Saturday after bones were found at Swim Beach.
Rangers and a dive team from the Las Vegas Metropolitan Police went to get the bodies.
Officials from the Park Service said that the Clark County Medical Examiner's Office will try to figure out when and how the person died as they look through records of missing people.
On May 1, human bones were found in a barrel near Hemenway Harbor. Police think the body was that of a man who died from a gunshot wound and was probably dumped between the mid-1970s and the early 1980s.
Less than a week later, people's bones were found at Calville Bay, according to the authorities.
More recently, on July 25, pieces of a human body were found near Boulder Beach.
As the water level in Lake Mead continues to go down, police think that more bodies may be found.
The discoveries have led to rumors about unsolved murder and missing person cases from decades ago. These cases involve organized crime and the early days of Las Vegas, which is only 30 minutes away by car.
Since 1983, when the reservoir was full, the lake level has dropped more than 170 feet.
The lake level is going down at the same time that most peer-reviewed science says the world is getting warmer, mostly because carbon dioxide and other greenhouse gases are getting more and more in the air.
Scientists say that over the past 30 years, the U.S. West, including the Colorado River basin, has become warmer and drier.
