A wildfire in the heart of Canada's oil sands has torched 1,600 homes and other buildings.
More than 80,000 people have left the city of Fort McMurray and the Alberta government has said the blaze would cover more than 494,211 acres by Sunday.
And these pictures from astronaut Tim Peake give us a good idea of just how much the flames are spreading.
Major Peake often tweets incredible pictures of Earth from on board the International Space Station.
And he's shared his view of the wildfire before.
Chad Morrison of Alberta Wildfires has said it was not uncommon to fight infernos in forested areas for months.
And there are now fears the blaze could reach the neighbouring province of Saskatchewan.
"In no way is this fire under control," Alberta premier Rachel Notley said.
Officials had hoped to complete the mass evacuation of work camps north of Fort McMurray on Saturday. Thousands of displaced residents got a drive-by view of some of the burned-out neighbourhoods as convoys continued.
No deaths or injuries have been reported since the fire started last Sunday.