National Park Service rangers found more human remains at the drought-hit Lake Mead National Recreation Area to the east of Las Vegas over the weekend.
Why it matters: It's fourth such discovery in the nation's largest reservoir by volume since May as a megadrought sinks Lake Mead's water levels to the lowest since 1937, per AP.
Details: "National Park Service rangers received an emergency call reporting the discovery of human skeletal remains at Swim Beach in Lake Mead National Recreation Area," Nevada, on Saturday morning, according to an NPS statement.
- Park rangers worked to recover the remains with the Las Vegas Metropolitan Police Department's dive team, the NPS said.
- The Clark County Medical Examiner is investigating the cause of death.
Driving the news: The Southwest is in the grip of a megadrought lasting more than two decades and studies show it's more severe than any in at least 1,200 years. It is being driven in large part by climate change, Axios' Andrew Freedman notes.
The big picture: Lake Mead spans Nevada and Arizona and is part of the vast Colorado River basin that provides water for agriculture and human consumption to seven states, while also generating electricity at the massive Hoover Dam.
- A report earlier this year found the Colorado River is the most endangered waterway in the U.S. as climate change and overuse threaten its future.
- Officials said in June that immediate action was needed to avoid a water supply crisis next year due to Colorado River's depleted reservoirs.
Go deeper: New Colorado River drought discovery shows how bad things can get
