South Wales Fire Service are tackling a blaze at GLJ Recycling on the Newtown Industrial Estate, in Cross Keys, Caerphilly.
A spokesperson from the fire service said 700 tonnes of scrap metal and tyres are well alight.
4 pumps and a water bowser are in attendance at the scene.
More top news
A father accused of imprisoning his 21-year-old daughter in Saudi Arabia has about two weeks to comply with a British judge's order.
A Newport garage has been boarded up after a court heard it was connected with alleged criminal activity.
It comes as official guidance was published warning that no level of regular drinking could be considered as "completely safe".