There are two things currently threatening California's oaks- Phytophthora ramorum, also known as Sudden Oak Death, and the Gold spotted oak borer.
Both of these are non-native pests that kill oaks. One is found mostly in wet areas of Northern CA, and the other in certain very dry parts of Southern CA.
What else do they have in common? They both can be spread on firewood.
Kudos this week to UC's California Agriculture and Natural Resources department for getting a good article published on the threat of the Gold spotted oak borer's potential for movement on firewood. See that article here.
And have a great weekend!