About 60 people have been forced to leave their homes because of a large fire at a recycling centre.
Bedfordshire Fire and Rescue Service said it was called at about 07:00 BST to the waste depot in Kingsway, Luton.
Nine appliances and crew were sent to tackle the fire in the building, which is 262ft (80m) by 131ft (40m).
It said eight homes and a block of flats have been evacuated while other residents were being asked to keep windows closed because of the smoke.
Nearby roads have also been closed by police.