Blue oaks have up to 500 years of climate history written in their rings.

https://massivesci.com/articles/california-climate-change-how-bad-trees/

Watching wildlife near his Sacramento home, Airola noticed migratory songbirds tended to prefer valley oaks to other trees. He teamed with UC Davis professor Steve Greco, an urban ecology expert, to do a formal study, centered in Airola’s Curtis Park neighborhood – home to valley oaks that are centuries old.

https://www.sacbee.com/entertainment/living/home-garden/article195461374.html

Today there are something like 400 species of trees in Silicon Valley. Oak trees, mostly coast live oak, make up about 4 percent of the total.

https://baynature.org/article/a-street-tree-revolution-in-silicon-valley/

As California redoubles its efforts to reduce greenhouse gases, officials are rooting around for new ways to meet the state’s goals. Included in their plan: recruiting billions of redwood, oak and pine trees to help diminish planet-warming gases by pulling carbon dioxide from the atmosphere.

https://www.dailynews.com/2018/01/24/in-californias-sierra-nevada-theyre-putting-the-trees-to-work/

Burned Tree Care:

Even badly scarred native trees and large shrubs can recover over time, sometimes by re-sprouting at the base. Unless a blackened branch or tree would damage people or property if it fell, leave it in place until spring leaf-out, when it will be clear how much of it is dead. Meanwhile, even trees that are completely dead are still important as habitat, and their roots still hold soil in place and prevent erosion.

The University of California provides specifics on how to assess and respond to damage to burned oak trees. (Burned Oaks: Which Ones will Survive?) Consult with an arborist if you think a large tree poses a danger and must be removed. Otherwise leave them be.

http://www.sonomacountygazette.com/sonoma-county-news/healing-the-land-after-the-fire