Indeed. But Lake Meade is down at least 170 feet from normal and Lake Powell is down approx. 153 feet. So the water has to be somewhere. I’d say it has more to do with injudicious use of water resources by an ever increasing population and infrastructure. When 2 people pull their daily needs of water from a 10 gallon bucket, it is easily replenished. When 100 people do the same...there will be problems.
There are several lakes up here in Northern Commiefornia that are extremely low. But that has more to do with DemonicRAT politicians allowing water to flow into the oceans to protect the Delta Smelt-it and other supposedly endangered fishies.
So, yeah, in that sense, the levels are caused by man. If you can call DemonicRATS men.
Maybe if California stopped draining it into the ocean to save a species of useless bait fish there would be more fresh water available. I’m too old to care anymore - people are getting what they’ve voted for over the last 60+ years. The chickens are coming home to roost, the tax man is at the door.