Did Tropical Storm Hilary Affect Lake Mead Water Levels? Lake Mead's water levels, at a record low last year due to ongoing drought, rose a bit during heavy rainfall from Tropical Storm Hilary. But rain isn't the lake's primary source of water.
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Bronson Mack, outreach manager for the Las Vegas Valley Water District, said Nevada is on pace to use 19% less water this year than it did in 2022. That's 13.8 billion gallons that will stay in Lake Mead because of conservation efforts in Las Vegas. That's almost 7 inches added to the lake.
Lake Powell and Lake Mead are unlikely to refill for another 50 years - and would need SIX consecutive years of deadly atmospheric rivers to replenish.
The Lake Mead problem could be resolved by draining Lake Powell and storing the water in Lake Mead. More than 5% of the water in the Colorado River evaporates off the surface of Lake Powell - which never should have been built.
Not exactly. The tropical storm brought nearly a monsoon season's worth of precipitation in just a few days. But that heavy rainfall likely had little effect on Lake Mead's water levels.
Most of our rainwater travels untreated through gutters, storm drains, channels, washes and eventually into the major source of our drinking water - Lake Mead. All storm drains lead to lake mead. Stormwater that falls in the Las Vegas Valley picks up pollutants and travels untreated to Lake Mead.
As mentioned, it's possible for the water level in Lake Mead to drop to the point where the dam cannot generate hydroelectric power. However, it's very unlikely that the lake would completely run out of water.
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.