Fire chiefs today warned people living near a Hartlepool waste plant to stay out of the smoke from the blaze as winds rise again.
Firefighters have been at the Niramax plant since about 11pm on Friday, when a large fire broke out and spread between two buildings use to store waste.
At one point 14 fire crews were at the scene, and efforts to tackle the blaze hampered by high winds over the weekend.
Crews remain at the scene today, and with strong winds forecast for this afternoon, Cleveland Fire Brigade issued a new warning at lunchtime today.
A spokesman said: "We are continuing to deal with the ongoing incident at Niramax in Hartlepool.
"Strong winds are forecast for this afternoon, and our advice to residents continues to be stay out of the smoke and keep windows shut.
“We anticipate being on site the remainder of today and possibly tomorrow.
"It is a deep-seated fire within tonnes of waste material and a time-consuming operation due to the amount of waste involved.”