Cal. Pub. Cont. Code § 20918

In case of an emergency, the board may, by resolution passed by a two-thirds vote of all of its members, declare and determine that public interest and necessity demand the immediate expenditure of public money to safeguard life, health, or property, and thereupon proceed to expend or enter into a contract involving the expenditure of any sum needed in such emergency without observance of the provisions requiring contracts, bids, or advertisement. If notice for bid to let contracts will not be given, the board shall also comply with Chapter 2.5 (commencing with Section 22050).