Eerie footage of the Martian-like reddish glow caused by a massive new wildfire in Canada has been captured by evacuees forced to flee for the second time from an uncontrolled blaze.

The video was filmed from a vehicle on a near deserted road amid an apocalyptic landscape soaked in a dense orange atmosphere.

The clip was posted on Instagram by officialladysaint, who wrote: "The crazy thing is that there's no filter on this."

They were again heading away from Fort McMurray in Alberta, where less than two weeks ago the entire 90,000 population had been forced to flee when the uncontrolled wildfire raged through some neighbourhoods and destroyed around one in six of the buildings.

Air pollution in the city remains at dangerously high levels.

 

the crazy thing is that there's no filter on this. crazy to evacuate once but to evacuate again is just an insane eye opener on how fast fire can travel. the images just keep running through my mind. be safe everyone, ymm strong. 💛â¤ï¸ #hometown #alberta #canadian #ymmstrong #fortmac #hellonearth #biggerbetterstronger #camp #hudsonlodge

A video posted by OWNER/CEO OF BOXX HEAD RECORDS (@officialladysaint) on May 17, 2016 at 12:25am PDT

The footage has emerged as more than 4,000 people were ordered to leave work camps around Canada's oilfields as the latest wildfire headed towards them.

Thousands more have been given precautionary evacuation orders. 

Suncor Energy, one of the oil sands' biggest operators, said it had started a staged and orderly shutdown of its operations near Fort McMurray as a precaution.

The company said there had so far been no damage to its facilities, and it had increased fire protection.

The sudden movement of the fire over the last few days has again cut off all northbound traffic, according to the Regional Municipality of Wood Buffalo.

The blaze has continued to burn out of control, covering 285,000 hectares (704,000 acres).

By Monday evening it was moving at a speed of 30 to 40 metres (98 to 131ft) a minute, and had crossed a critical firebreak north of the city to push into the oil sand camp areas.

Trees and plants have been removed from the fire's path to try and stop it from spreading further north.

About a million barrels a day of oil sands crude production was shut down as a precaution and because of disruptions to regional pipelines. 

Firefighters have managed to protect much of Fort McMurray but evacuated residents have not been allowed to return to their homes, partly because of hot spots that remain.