This is how ice buildup led to severe flooding in Fort McMurray

Ice jams can stretch for kilometres, reach several metres in height and cause rivers to rise in a matter of hours, says one river ice expert. An ice dam roughly 25 kilometres long on the Athabasca River flooded downtown Fort McMurray, Alta., and forced 13,000 people out of their homes this week. Another ice jam on the Peace River estimated to be almost 40 kilometres has ousted 450 people from the hamlet of Fort Vermilion.Northern Alta. flood evacuees to receive emergency cash payment COVID-19 re