One crew from Amersham, one crew from Aylesbury and one crew from High Wycombe, along with an officer, attended a fire involving two storage outbuildings measuring approximately 10 metres by 5 metres in total.
Firefighters used one main jet and one hose reel jet to extinguish the fire.
Crews cooled gas cylinders involved in the incident and carry out damping down and turning over operations to eliminate remaining hotspots.
Thames Valley Police also attended.