Homes along Cougar Creek in Canmore, Alberta barely hang on as the town struggles to deal with flooding Thursday June 20, 2013. Calgary city officials say as many as 100,000 people could be forced from their homes due to heavy flooding in western Canada, while mudslides have forced the closure of the Trans-Canada Highway around the mountain resort towns of Banff and Canmore. (AP Photo/The Canadian Press, Rocky Mountain Outlook, Craig Douce)