Firefighters spent seven hours tackling a blaze near Denny.
Six fire engines and three specialist appliances were sent to the incident at Leslie Park, around half a mile outside the town, which was made more hazardous by the presence of chemicals and diesel.
The emergency call was received at around 1 a.m. and it was 8 a.m. before the blaze was fully extinguished.
A crew remained at the scene for several more hours to dampen down the site and the police were also in attendance.
Firefighters were posted either side of the opening to premises to alert drivers to the hoses which ran across the road.
A fire service spokeswoman said: “Initial crews were faced with a well-developed fire and immediately summoned additional appliances and resources to attend.
“Crews have been challenged by additional hazards in the form of chemicals stored and suspected cylinders within the premises.
“This added to the partial collapse of sections of the roof and walls.”
The fire spread to external storage areas and engulfed stockpiles of used tyres.