An 89m (292ft) wind turbine caught fire after storms hit Cambridgeshire in the early hours of Wednesday.
Firefighters were called to the blaze at the top of the turbine in Benwick Road, Doddington, around 7.50am.
Parts of it have broken off, with debris scattered in the area but there was no danger to the public, the fire service said.
The cause of the fire is unconfirmed despite some locals suggesting the turbine may have been struck by lightning.
Mellisa Mathews who lives nearby said: "I heard a huge bang at about 7.30am and looked out and saw the turbine on fire. At the time there was a lot of thunder and lightning".
Cambridgeshire Fire and Rescue Service said crews were on standby but the fire was allowed to burn out safely and required no action from them.
The five turbines at the Ransonmoor site, in operation since 2007, produce 26 GWH of electricity per annum, enough to power 6,600 homes for a year.