Record: Extreme rainfall and flooding in Alberta could result in one of the most costly natural disasters in Canadian history -- and it may not be an isolated event.
Flooding in southern Alberta that occurred in 2005 was then considered a one-in-100-years disaster, yet the heavy rains this week that have led to flooding in Banff, Canmore, Calgary and south toward Lethbridge have caused more widespread damage than the previous event.
According to Jason Thistlethwaite, director of the Climate Change...