A firefighter opens a ventilation hole in the roof as they battle a blaze at Edgar Clark Pallet on Thursday at 1491 Pond Road in Mount Vernon.

Firefighters open a ventilation hole in the roof as they battle a blaze at Edgar Clark Pallet on Thursday at 1491 Pond Road in Mount Vernon.

Firefighters open a ventilation hole in the roof as they battle a blaze at Edgar Clark Pallet on Thursday at 1491 Pond Road in Mount Vernon.

Firefighters open a ventilation hole in the roof as they battle a blaze at Edgar Clark Pallet on Thursday at 1491 Pond Road in Mount Vernon.

Firefighters battle a blaze at Edgar Clark Pallet on Thursday at 1491 Pond Road in Mount Vernon.

Firefighters work to put out a fire at Thursday at Edgar Clark Pallet on Pond Road in Mount Vernon.

Firefighters battle a blaze at Edgar Clark Pallet on Thursday at 1491 Pond Road in Mount Vernon.

Firefighters battle a blaze at Edgar Clark Pallet on Thursday at 1491 Pond Road in Mount Vernon.

Firefighters battle a blaze at Edgar Clark Pallet on Thursday at 1491 Pond Road in Mount Vernon.

Firefighters set up portable pools for a water supply as they battle a blaze at Edgar Clark Pallet on Thursday at 1491 Pond Road in Mount Vernon. Several tanker trucks shuttled to the scene with water to fill the pools.

Firefighters from numerous area fire departments were on the scene at about 10:30 a.m. Thursday for a fire at Clark Pallet at 1491 Pond Road in Mount Vernon. Also seen in the photo are Justin Tibbetts, left, and Chris Clark; Clark is the nephew of the business's owner, Donny Clark.