Climate change has caused the water levels in rivers, lakes, and streams around the world to be low. More ancient artifacts and human remains could surface as the world warms.

It is a prime example. The Southern Nevada Power Authority says water levels have plummeted. After the construction of the nearby Hoover Dam, the lake's levels fell to their lowest level in 77 years.

Climate change has led to the discovery of ships and bombs from World War II and skeletons near Sin City.

Lake Mead's sunken secrets

A rusted metal barrel, near the location of where a different barrel was found containing a human body, sits exposed on shore during low water levels due to the western drought at Lake Mead on May 5, 2022.
A rusted metal barrel, near the location of where a different barrel was found containing a human body, sits exposed on shore during low water levels due to the western drought at Lake Mead on May 5, 2022.
Mario Tama/Getty Images

Human remains that were once submerged in the lake have been unveiled due to the low water levels. Two sets of bones were found in a week. Two more sets of remains were found in July and August.

According to a forensic anthropologist who consults with the Clark County coroner's office, there is a chance that more bodies will turn up.

Human remains of missing persons are likely to be revealed as the water level continues to fall.

A formerly sunken boat sits upright into the air with its stern stuck in the mud along the shoreline of Lake Mead on June 22, 2022.
A formerly sunken boat sits upright into the air with its stern stuck in the mud along the shoreline of Lake Mead on June 22, 2022.
AP Photo/John Locher

The Associated Press reports that in June and July, the lake's water levels were so low that boats were beached and sunken.

World War II-era relics surface

A sunken World War II-Era Higgins landing craft that used to be nearly 200 feet underwater is being revealed near the Lake Mead Marina as the waterline continues to lower. Image taken on July 01, 2022.
A sunken World War II-Era Higgins landing craft that used to be nearly 200 feet underwater is being revealed near the Lake Mead Marina as the waterline continues to lower, on July 01, 2022.
Ethan Miller/Getty Images

According to The Associated Press, a World War II-era boat was found for the first time in decades in June.

The park service told CNN that "whether it sank by accident or was deliberately sunk to get rid of a vessel no longer of use is unclear."

Other World War II-era artifacts could surface if the water continues to fall. The B-29 bomber is hidden in the lake's depths.

Unexploded bombs from WWII are seen on dry waters in Italy's Po river on August 4, 2022.
Unexploded bombs from WWII are seen on dry river banks in Italy's Po river, on August 4, 2022.
Nicola Ciancaglini/Ciancaphoto Studio/Getty Images

Italy's Po River, the country's largest, reached low levels during its worst dry spell in 70 years, leading to the rediscovery of the sunken barge. The Italian river revealed a previously submerged 1,000 pound bomb from World War II in late July.

The bomb was found by fishermen on the bank of the River Po due to a decrease in water levels caused by the dry spell. There was a bomb that had to be removed.

As rivers dry up, lost cities emerge 

Archeologists rushed to uncover a 3,400-year-old city along Iraq's Tigris River in December of 2016 after the water level in the river dropped due to a lack of rain.

A palace with 20-foot walls is part of the Kemune archaeological site.

Overview of the ancient village of Aceredo that had been submerged in Spain. Picture taken February 10, 2022.
Overview of the ancient village of Aceredo that had been submerged in Spain, on February 10, 2022.
REUTERS/Miguel Vidal

A once-submerged village in Spain came back to life in February after a dam on the Spanish-Portuguese border was drained due to a lack of rain. The ruins of the ancient village of Aceredo in Spain's northwestern Galicia region are attracting tourists after being submerged in water for decades.

Some locals think it's a sign of what's to come.

I feel like I'm watching a movie. The 65-year-old from the area said that he felt sad. "My feeling is that this is what will happen as a result of climate change."