Residents living close to the Perkins site in Peterborough are being urged to stay indoors while a controlled explosion is carried out on an unstable chemical.
The alert was raised at 1:30 this morning and staff were evacuated. A 500 metre cordon has been put up around the area. The controlled explosion is due to happen in the next half hour.
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Truckfest is back in Peterborough. The two day event sees thousands of people flocking to the East of England Showground.
It will be dry overnight with sunny spells tomorrow before rain and strong winds later in the evening
Anglia Weather: Mostly dry and occasionally sunny