"Some 2,000 residents of wildfire-ravaged Fort McMurray, Alberta, will not be able to return home this week as planned because of the risks posed by debris and contaminants including 'caustic' ash, Alberta Premier Rachel Notley said on Monday."

"Some crude producers restarted operations on Tuesday in Canada's energy heartland as a mass evacuation of the Fort McMurray oil town entered its fourth week, though cool weather and light winds were helping firefighters dampen the blaze."

"WARSAW, Poland -- It is the last remaining relic of an ancient forest that stretched for millennia across the lowlands of Europe and Russia, a shadowy, mossy woodland where bison and lynx roam beneath towering oak trees up to 600 years old."

"WASHINGTON -- The nation's top foresters on Tuesday warned of another hot, dry and costly wildfire season in 2016 with global climate change, droughts and more people living in the woods leading to more acres and more homes burned in more states."

"A massive wildfire burning around the oil sands hub of Fort McMurray was growing and moving rapidly north late on Monday, forcing firefighters to shift their focus to protecting major oil sand facilities north of the city, officials said."

"Scientists say the near-destruction of Fort McMurray last week by a wildfire is the latest indication that the vital boreal forest is at risk from climate change."

"Alberta's unusually early and large fire is just the latest of many gargantuan fires on an Earth that's grown hotter with more extreme weather."

"Last week, a group of researchers published saddening news about “sudden oak death,” spread by an invasive water mold, that has killed over a million trees in coastal California. ... Unfortunately, it’s a familiar story."

"Repair crews were expected to assess wildfire damage to the Canadian energy boomtown of Fort McMurray on Tuesday as the oil sands companies surrounding the ravaged city looked at bringing production back on line."

"Good news hasn’t been easy to come by at Alberta’s emergency management centre. ... Finally, on Sunday, there was some relief."