Western U.S. Water Crisis Grows as Snowpack Hits Dangerous Lows

Trouble is on the horizon for the western U.S. thanks to woefully low snowpack levels. Read on for why climatologists are sounding the alarm bell about low water supplies heading into the hot summer season.

Climate Change Playing a Role in Water Supply Issues in the West

The dry winter for much of the West is likely to translate to major water availability concerns this summer. For years, scientists and local officials have looked to the April 1 snowpack measurement as the most important indicator of what type of water restrictions may be in place during the dry season. The 2026 numbers are not offering a lot of hope.

There were a lot of factors over the last few months that have led up to this concern. Temperatures between November and February were some of the warmest in history for much of the western U.S., trending about 5 to 10 degrees above the historical average. March brought an early-season heat wave to a large swath of the West, amplifying the impacts of the unseasonably warm winter.

The March heat naturally worked to chip away at the snowpack from the prior months. By April 1, California's snowpack was sitting at just 18% of normal. The warmer temperatures during the winter months meant that precipitation that normally would fall as snow came down as rain.

This means that even places that welcomed normal levels of moisture over the winter did not build a significant enough snowpack to get through the spring and summer. The northern Rockies and the higher terrains of the Pacific Northwest were hit the hardest by the lack of meaningful snowfall this year.

Climate change is largely to blame for the dwindling snowpack levels. As temperatures continue to rise around the globe, the snow levels are creeping up to higher elevations across the western U.S.

The result of the snowfall deficit over the last several months is also being demonstrated in higher streamflows. Several river basins in the western U.S. saw near record-high streamflows, indicating that the snow was melting at a faster clip. In the past, water would remain frozen until the last part of the spring season. However, the combination of the warmer temperatures and moisture falling as rain instead of snow has increased the runoff.

Update on the Colorado River

The Colorado River Basin is arguably the most important water supplier in the West. Over 40 million people spread across seven states rely on the water from this major river. In addition to the millions of people dependent on the river, approximately 5.5 million acres of farmland lean on this crucial water supply.