About 20 firefighters returned to the RockTenn Recycling plant late Monday afternoon.
Firefighters had already worked for several hours to extinguish a fire at the plant.
According to Tampa Fire Rescue, the fire sparked up just before 3 p.m. Sunday at the plant in the 5100 block of north 26th Street.
On Monday, fire crews returned to the scene to mop-up smoldering spots.
Workers at the plant used fork-lifts and front-end loaders to reach into the pile and remove portions of debris so firefighters could spray foam on hot spots.
The cause of today's rekindle is under investigation.
On Sunday, employees at the plant noticed a small fire under a pile of debris Sunday afternoon and tried to put it out. However, the fire quickly grew and firefighters were called.
Firefighters found the fire was threatening a building at the plant when they arrived. The fire was quickly brought under control, but firefighters had to remain at the scene through the night as piles of debris continued to smolder. Firefighters had to keep an eye on hot spots underneath the debris.
About 60 firefighters responded to the scene. There were no injuries reported.
The fire caused about $150,000 in losses to recycling debris that burned. Authorities are investigating.