California Code, Government Code - GOV § 850.8

Any member of an organized fire department, fire protection district, or other firefighting unit of either the state or any political subdivision, any employee of the Department of Forestry and Fire Protection, or any other public employee when acting in the scope of his or her employment, may transport or arrange for the transportation of any person injured by a fire, or by a fire protection operation, to a physician and surgeon or hospital if the injured person does not object to the transportation.

Neither a public entity nor a public employee is liable for any injury sustained by the injured person as a result of or in connection with that transportation or for any medical, ambulance, or hospital bills incurred by or in behalf of the injured person or for any other damages, but a public employee is liable for injury proximately caused by his or her willful misconduct in transporting the injured person or arranging for the transportation.