Looks like the danger has passed. There was an evac late last night of about 900 people who were allowed to return home just after 11:00 am today.

Apparently, the slide was an estimated 40 million cubic metres in size which makes it one of the largest in Canadian history.

More details here and if you read down the page, this quote states the continuing danger:

Options for clearing the mix of soil, rock and snow in the slide are limited by the lack of stability in the area of the slide. “It wouldn’t take much to drop another million cubic metres off the face of the peak that slide.”

Our previously made plans for going up into the area on Aug 21-22 are on hold until further notice...
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock