Reuters: 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.
The city of 90,000 people was evacuated in early May as an uncontrolled wildfire ripped through some neighborhoods, destroying about 10 percent of the city's homes.
It also forced around a dozen oil sands projects in the region to halt more than a million...