Firefighters were called to a blaze at Holme Fen Nature Reserve, in Holme, at 10.24am on Saturday (August 8).
Firefighters were first called to the blaze, logged as a fire in the open, at 10.24am.
Crews from Dogsthorpe, Stanground, the north roaming fire engine, Whittlesey, Huntingdon, Thorney, St Neots, Ramsey and Sawston attended.
A water carrier, from Ramsey, a specialist 4×4 vehicle from Thorney, and a crew from Oundle, in Northamptonshire, were also called.
A spokesperson for Cambridgeshire Fire and Rescue Service said: “Firefighters arrived to find a fire involving hedges and undergrowth, and it was well alight.
“They have been working extremely hard in sectors to get the fire under control and stop it from spreading.
“They have been using equipment such as beaters to control and extinguish the fire.
“The fire is now surrounded, good progress has been made, and crews are continuing to work to extinguish it.”
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