A municipal fire department answering any fire alarms or performing fire prevention services or rescue, resuscitation, first aid, inspection or any other official work outside the corporate limits of its municipality shall be considered an agent of the State of Oklahoma, and acting solely and alone in a governmental capacity. Said municipality shall not be liable in damages for any act of commission, omission, or negligence while answering or returning from any fire or reported fire or doing or performing any fire prevention work or rescue, resuscitation, first aid, inspection or any other official work.
Okla. Stat. tit. 11, § 29-108