What lake is losing all its water?

The Colorado River's Lake Mead in Southwest US has receded dramatically amid a megadrought and decades of overuse. The Caspian Sea, between Asia and Europe – the world's largest inland body of water – has long been declining due to climate change and water use.



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Over half of the world's lakes have shrunk, according to a new study published on Thursday. An international research team published their findings in the journal Science and found global warming and human activity to be the chief culprits.

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What happens if Lake Mead dries up forever? If Lake Mead were to run out of water, the Hoover Dam would no longer be able to generate power or provide water to surrounding cities and farms. The Colorado River would essentially stop flowing, and the Southwest would be in a major water crisis.

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Without Lake Mead, Las Vegas would lose access to 90 percent of its water sources. If Lake Mead were to reach dead pool, it would technically still be able to supply drinking water to Las Vegas. But there will not be enough water for agricultural activities.

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Since 1983, years of drought along with high water demand have caused the lake to drop by 132 feet. Today, the lake is at only 30% capacity, its lowest level since it was built in the 1930s. Fortunately, heavy rainfall early in 2023 has relieved the situation a little, but only temporarily.

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As the British Medical Journal reported in March 2023, the drying Euphrates River has forced some residents to rely on contaminated groundwater, leading to the spread of typhoid fever and cholera.

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It's worrying to see the lake's water level decline but the chances of it fully drying up are very slim. The Hoover Dam and Lake Mead still do so much important work for the southwest USA, in terms of both water supply and power generation.

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Mead reaches dead pool at 895 feet. If Lake Powell reaches dead pool, the US Bureau of Reclamation—which declined our interview requests—would be unable to meet its obligation to deliver water downstream to Lake Mead. In which case, 40 million people would be affected.

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Lake Mead's dramatically decreased water level has brought concerns about climate change, water consumption, and drought conditions in the Southwest. However, the water shortage has also revealed startling discoveries. Lake Mead's story is one that exhibits the importance of discovery and conservation.

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6 Lakes That Are Drying Up
  • Lake Poopó This lake in west-central Bolivia occupies a shallow depression in the Altiplano, or “High Plateau,” at 12,090 feet (3,686 meters) above sea level. ...
  • Aral Sea. ...
  • Lake Mead.
  • Lake Chad. ...
  • Lake Urmia. ...
  • Dead Sea.


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The falling water levels have uncovered large swaths of Lake Mead, revealing old settlements and long-lost relics – including a second world war-era boat – in addition to the bodies.

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Lake Michigan is considered the lake that holds the most deaths among the five Great Lakes in North America. Despite its reputation for powerful undercurrents claiming a minimum of a few lives each year, the warm, welcoming water is a favorite swimming spot for locals and visitors.

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The Aral Sea was located in Central Asia between Kazakhstan and Uzbekistan. With an area of 68,000 km2, it was once the 4th largest lake in the world. Its name means “Sea of Islands”, as over a thousand islands were once dotted across its surface.

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Lake Mead's water level continues to fall to historic lows, bringing the reservoir less than 150 feet away from “dead pool” — so low that water cannot flow downstream from the dam. The loss of water entirely from this source would be catastrophic.

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“While the amount of precipitation received in the lower basin and from tributary inflows helps, the greatest source of water for Lake Mead is still snow melt and flows from the upper basin.”

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The vast reservoir's water level has dropped more than 170ft (52m) since 1983, the same year the Colorado River flooded the dam's spillways. Over-extraction, extreme heat and decreased snowmelt have burdened the Colorado River Basin and nearly 40 years later, Lake Mead is down to about 27% of its capacity.

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