In June 2013, days of relentless rain send the Bow and Elbow Rivers over their banks across southern Alberta, and this film reconstructs what became one of Canada's costliest natural disasters. Calgary's downtown core and the town of High River go under water within hours, and more than 100,000 people are evacuated as the flood outpaces warning systems built for slower rivers. Archival news footage and rescue video show submerged neighborhoods, stranded residents pulled from rooftops, and emergency crews working through the night, while interviews with survivors and responders describe how quickly a routine storm warning turned into a province-wide crisis. The film tracks the flood's spread from mountain tributaries down through Calgary to the Siksika Nation, where the damage proved just as severe but drew far less attention. It also weighs the billions of dollars in damage against the response failures exposed by the disaster, asking how a modern flood-control system got caught so unprepared. Part of the Rogue Earth series on extreme natural events.