a place called Arrowhead was devastated by the beetles after a moratorium on all tree cutting started in the '70's.
I think the lower Sequoia is next to turn brown ,it has already started showing signs in the logging protected areas.
they say it comes down to "trees per acre". The more trees per acre the less moistre per tree, means not enough sap for the tree to protect itself with. The answer is not poison, it is thinning
How are the fires in California ?
Is Big Bear still worried ?
No, it is both. but monoculture is the biggest cause of epidemics like this, too many plants of the same kind. You could also consider watering, occasionally.