
About 50 firefighters have been tackling a blaze on an industrial estate affecting about 500 tonnes of recycling waste.
Northamptonshire Fire Service was called to Earlstrees Industrial Estate in Corby shortly before 14:00 BST on Monday.
The fire spread to shipping containers at a neighbouring business, and four crews worked overnight and into Tuesday to extinguish and contain the blaze, the fire service said.
Chris Brooke, 24, from Stanion, could see the fire from Northampton and said: "It looked like a tornado coming from Northampton; as I was getting closer, it was just getting bigger and bigger."


People living nearby have been asked to keep windows and doors shut.
At the peak of the fire, 10 crews and two aerial appliances were at the scene.
Four fire crews and one aerial appliance were at the site on Tuesday morning.

Lee Duffy, Reform UK councillor for the Lloyds and Corby Village ward, said he could see the smoke from his garden.
In a Facebook post, he said: "I've just been up there and am reliably informed by 'Fire Wardens' and 'First Aiders' that they believe nobody has been injured.
"Let's hope our emergency service personnel stay safe as they battle with what looks to the untrained eye to be a serious fire."
Gretton Brook Road remains closed, the fire service said.

Geoff Rhodes, 81, could see the fire from his home in Market Harborough, which is a town in Leicestershire about 14 miles (22.5km) away.
"It's a big old fire," he told the BBC.
"It looked like it was only a mile away from where we were.
"The smoke is horrendous; it blocked the sun out at one point."

Meanwhile, crews were also called to Kingsthorpe Golf Club in Northampton, after a blaze at the clubhouse.
Residents were asked to avoid the area.
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