South Wales Police say the recycling plant that was on fire yesterday evening is expected to burn for two days.
Firefighters were called to a blaze at the 'SitServ Recycling Centre' in Llandow Trading Estate in Cowbridge last night.
The cause of the fire is yet to be established.
It's thought that the building has asbestos on the roof. As a precautionary measure, residents within a two mile radius, particularly those in Llantwit Major and Southerndown, are being asked to keep their doors and windows closed.
Premises near to the scene of the fire are also likely to be affected.
More top news
A disabled basketball player from Holyhead says he needs a specialist wheelchair to fulfil his dream of competing in the 2020 Paralympics.
Rain in the east will clear through this evening leaving much of the night drier with clearer spells.
Emergency services are being put through their paces in a two-day anti-terror exercise.