Residents living close to a large fire in Balby, Doncaster have been asked to stay indoors and keep windows and doors closed.
Nine fire engines and around 45 firefighters have responded to the incident at a waste recycling site on Balby Carr Bank.
Local road closures may also be in place, with people asked to avoid the area.
Firefighters were mobilised shortly after 5.15pm on Friday (25 February) and expect to remain on the scene for a significant length of time.
The fire involves mixed metals and industrial waste and covers an area around 100m by 40m in size.
A high volume pump is being set up to support the firefighting operation, with specialist waste fire advisors also in attendance.
An investigation into the the cause of the fire will begin once the fire has been fully extinguished.