“Despite the oppressive dryness that has plagued the region for more than 20 years, California has, in large part, avoided reductions to its usage of the Colorado River. But now that reservoir levels have fallen drastically, the Golden State may be forced to use less water, a prospect that would only further strain a state that is already asking residents in some regions to stop watering lawns and take shorter showers.”
…
“Over the past 20 years, as the effects of climate change have become more apparent, water authorities in their respective states have been able to hammer out agreements on moderate cutbacks. But it hasn’t been enough.
Supplies at Lake Mead and Lake Powell are dangerously low, holding just more than a quarter of their total capacities — and threatening the dams’ ability to generate electricity and provide water to its nearly 40 million users. At its highest level, in the 1980s, Lake Mead could have submerged the Empire State Building up to its top floor. Now, water levels have dropped by nearly 200 feet, or 20 stories, exposing a stark white “bathtub ring” around the rocky walls of the perimeter.
The new reality will force the region to shift away from a water source upon which it has relied for centuries, and, in some cases, make tough choices that are sure to ripple nationwide — such as whether to continue alfalfa farming for cattle feed or switch to more drought-hardy crops. The terms laid out in the coming weeks could offer a new blueprint for how America adapts to the increasingly-difficult realities of climate change.”
https://www.politico.com/news/2022/07/06/colorado-river-drought-california-arizona-00044121