Fort McMurray return

Toxic ash from the powerful fire poses a safety hazard.
Evacuees have started to return to the city.
This week's return is a welcome end to the wait for things to begin turning around. But it also a beginning -- the very important beginning to the rebuilding of their vibrant community. The road ahead, after all, will be difficult. Much of the city has been burned to the ground -- though, thankfully, not nearly as much as had been feared -- and much rebuilding remains.
"We would not do this if it was not safe to do so."
The premier also thanked first responders.
Here's what happens when a city shuts down.
They have some concerns.
Not everything will be up and running immediately.
Premier Rachel Notley says arrangements will be made for residents.
The hospital, municipal building and all functioning schools were saved, said the premier.