Cal Gov Code 8660
Liability: Mutual Aid Agreement
A state, its officers, or its employees who, in good faith, provides aid pursuant to an interstate arrangement, agreement, or compact will not be held legally responsible for acting or failing to act. This section applies to the maintenance or use of equipment or supplies.
Officers or employees rendering aid pursuant to interstate arrangement or compact; Immunity from liability
No other state or its officers or employees rendering aid in this state pursuant to any interstate arrangement, agreement, or compact shall be liable on account of any act or omission in good faith on the part of such state or its officers or employees while so engaged, or on account of the maintenance or use of any equipment or supplies in connection with an emergency.