At least one barn was destroyed by fire Tuesday while two other structures were in danger in Ligonier Township.
The Westmoreland Department of Public Safety reported the blaze started just after 9:30 p.m. The fire was brought under control within 30 minutes.
No injuries were reported, and a dispatcher said firefighters on the scene reported the buildings were vacant.
Responding were firefighters from Darlington, Ligonier, Ligonier Township, Wilpen, Waterford, Youngstown, Cook and Chestnut Ridge.
A cause had not been determined late Tuesday night.