https://www.mercurynews.com/2023/03/26/why-trees-turn-deadly/

The same urban canopy that provides so much relief in the Bay Area’s summer is now exacting a winter toll, with hundreds of trees weakened by years of drought collapsing in relentless rain and wind — claiming lives, buildings and roads.

“Like for us humans, it takes a little bit of time to recover from stress, the lack of water and high summer temperature,” said UC Davis ecologist Alessandro Ossola, who specializes in urban areas. “Some of our trees are failing to adjust to newly wet soil and atmospheric conditions….they’re simply unable to cope when climate and environmental conditions revert too fast.”