More than a dozen fire vehicles attended the incident on Kirkhaw Lane in Ferrybridge, Knottingley, this afternoon.
Hoses stretching hundred of metres were being utilised to bring the fire under control at Company Coaches, which is next to Ferrybridge Power Station.
One eye witness, who works near the warehouse said: “There was no explosion or anything like that, but there were flames shooting 30 or 40ft up in the air.
“They were really high and there was a lot of smoke.”
A statement from West Yorkshire Fire and Rescue Service said: “Firefighters are currently using large water jets to protect the surrounding area from this fire, due to the fact acetylene cylinders are involved.
“A five pump water relay is in place to provide water.
“All roads surrounding the fire are now closed to the public, including Kirkhaw Lane from the junction with Stranglands Lane. There have been no evacuations and no injuries.”
Emergency services were called to the site, close to the M62 and A1M motorways and less than half a mile from Ferrybridge Power Station, shortly before 12.40pm.