Fire crews have been dealing with a large fire overnight at a farm in Wisbech St Mary.
Four engines are involved along with the aerial appliance in Rummers Lane.
Three large barns and 100 tonnes of straw are involved.
No one's been injured.
Crews were called at 12.08am and found a well developed fire when they arrived.
Cambridgeshire Fire and Rescue Service is asking people to avoid the area.
- Watch footage from the Fire Service