Some of our trees are looking mighty ragged after several years of drought. That's to be expected.
But the kinds of stresses they're showing are new to researchers who know trees well.
Those include the (southern) coast redwoods and the giant sequoias... many are clearly stressed, and some are dying.
Redwood expert Anthony Ambrose at the University of California-Berkeley points out that the biggest redwoods need up to 2000 liters of water A DAY to survive, and drought and climate change will challenge that intake.
He joins us with his observations and outlook.