Wildfires tore through Saddleworth Moor as scorching temperatures hit the UK.
Footage showed huge plumes of smoke stretching along moorland in the north-west of England.
The blaze broke out on Monday night and spread destroying an area of land in its path, Greater Manchester Fire Service said.
It came as temperatures soared towards 30C in some parts of the UK.
Crews remained in place on Tuesday having "worked tirelessly to combat the blaze", the fire service said.
Station manager Lee Bourne said: "Crews are making good progress this morning and are managing to get a hold on the fire."
He urged people in the surrounding areas of Carbrook, Greenfield and parts of Saddleworth and Stalybridge to keep doors and windows closed due to low-lying smoke.
Group Manager Phil Nelson said on Tuesday afternoon: “We’re working with United Utilities and the Peak District National Park and Mountain Rescue to ensure that any work we undertake is done in a coordinated and safe way.
“We are utilising a helicopter to dump water onto the moorland to try and extinguish it as well as all of our emergency resources from our wildfire capabilities."
The force described it as "hard, hot and exhausting work", and warned people to be careful while enjoying the outdoors.
It said: "Take extra care when out in the countryside - a stray cigarette, a discarded glass bottle, or a spark from a BBQ can all cause untold devastation."
Meanwhile, dozens of firefighters battled a blaze on moorland in Rivington, Lancashire.
Deputy Chief Fire Officer for Lancashire Justin Johnston said: "We've been aware that this might occur given the long dry spell. Fortunately crews are well trained and well equipped with special wildfire procedures.
“Please take extra care while this beautiful weather continues."
