Shelf fire: Explosions heard from blaze at industrial site.
Fire crews will remain at the scene of an industrial estate blaze featuring 25 lorries throughout the night.
Fifty firefighters tackled the height of the blaze at Bowlshaw Lane, near Shelf, Halifax, as police advised motorists to seek alternative routes.
Supt Owen West said fuel tanks on vehicles inside the premises exploded and advised people to stay inside for safety.
Diesel, LPG and acetylene is on the site, West Yorkshire Fire Service said.
The A644 Brighouse Road closed both ways between A647 and A6036 and there were diversions for traffic in the area.
Supt West said the fire was at a garage containing scrap vehicles, there had been no reported injuries and the "smoke plume looked more serious than it is".