West Midlands area fire commander Steve Vincent said: "This is the largest fire that we've had in the West Midlands. It is a major fire and we've got support from surrounding fire brigades to help us deal with this."
More than 200 firefighters are tackling the blaze.
Firefighters are struggling to deal with a fire at a recycling plant in the Midlands which was started by a stray Chinese lantern.
Around 50,000 tonnes of plastic recycling material and a factory is on fire in Smethwick.