The massive wildfire raging near Fort McMurray in Alberta, Canada, has moved south, forcing more evacuations after 88,000 people fled the city in the nation's energy heartland.

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Officers look on as smoke from Fort McMurray's raging wildfires billows into the airTopher Seguin/Reuters
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A helicopter flies into thick smoke while battling a major forest fire outside of Fort McMurrayTopher Seguin/Reuters
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A wildfire rages along Highway 63 – Fort McMurray, AlbertaTerry Reith/CBC News/Reuters
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An aerial view from the helicopter of Alberta Premier Rachel Notley shows smoke rising from raging wildfires around Fort McMurrayCheryl Oates/Government of Alberta/Reuters

Officials issued mandatory evacuation orders for the Anzac, Gregoire Lake Estates and Fort McMurray First Nation communities, located about 50 km (31 miles) south of the battered city. Weary evacuees from Fort McMurray had to board buses headed for Edmonton, after being forced out of their temporary shelter in nearby Anzac. They had arrived there on 3 May after being evacuated from their homes.

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Volunteers help carry food into a community centre in Anzac where residents of Fort McMurray assembled after their city was evacuatedTopher Seguin/Reuters
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Rhonda Kossey looks after her three dogs, Elmo, Gizmo, and, Lacey while staying at the Anzac Community CentreTopher Seguin/Reuters
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A Fort McMurray resident sleeps in his car in Anzac, AlbertaTopher Seguin/Reuters
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A resident of Fort McMurray walks past a evacuation centre sign put up in Anzac, AlbertaTopher Seguin/Reuters
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Evacuees from the Fort McMurray wildfire settle in at The Expo Centre in Edmonton, AlbertaDan Riedlhuber/Reuters
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Residents are evacuated by bus from Fort McMurrayTopher Seguin/Reuters

Authorities said there had been no known casualties from the blaze itself, but fatalities were reported in at least one vehicle crash along the evacuation route.

Unseasonably hot temperatures combined with dry conditions have transformed the boreal forest in much of Alberta into a tinderbox. Fort McMurray – in the heart of Canada's oil sands — is surrounded by wilderness and contains the third largest reserves of oil in the world, behind Saudi Arabia and Venezuela.

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Smoke and wildfires near Fort McMurray are shown in this satellite photo from NasaNasa/Reuters
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Towering flames rise behind an industrial area south of Fort McMurrayTerry Reith/CBC News/Reuters
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A plume of smoke hangs in the air as forest fires rage on in the distance in Fort McMurray, AlbertaCole Burston/AFP

Hot, dry, windy weather has made the massive wildfire all but impossible to control. Temperatures hit 31 degrees Celsius (88°F) on 4 May. The entire city of Fort McMurray was ordered to evacuate on 3 May, and some 1,600 structures have been destroyed, Alberta Premier Rachel Notley said. However, cooler weather has arrived. Environment Canada forecast a high of 19 degrees Celsius (66°F) with a 30 percent chance of rain on 5 May.