Beating at flames in "truly energy sapping" heat, these pictures show the sheer enormity of the task exhausted Manchester firefighters face as they seek to bring an end to the blaze sweeping across Saddleworth Moor.
As the fire enters its fifth day and shows no signs of abating, 100 members of the military have been called in to help tackle the "biggest fire in living memory".
On Wednesday night, smoke from the seven square miles of fire turned the sun red, while ash rained down from the sky as the inferno raged above Oldham and Tameside.
As well as the firefighters on the ground, a helicopter has been dropping water on to the fires, but what the force really needs to help them out is rain, but none is forecast.
Due to the predicted hot, dry weather, Assistant Chief Fire Officer Tony Hunter said the fire could be "prolonged for days, if not weeks.
"It is dependent on a downpour of rain - and it would have to be a significant downpour of rain because it is so dry it would be absorbed very, very quickly."
He also warned that a change in wind direction could create a "different picture then in terms of the fuel available to this fire".
Such is the extent of the fire that NASA satellites have picked up the plumes of smoke.
While firefighters have been hard at work, they have been provided with refreshments by local residents and businesses .
The cause of the original seat of the fire - thought to be at Buckton Hill, Carrbrook - has not been established but fire chiefs said a detailed investigation would be launched at the appropriate time.