Rivers fed by torrential mountain rains spilled across the prairies of southern Alberta, leaving two people dead and submerging downtown Calgary. A third person is still missing. People have been evacuated from several communities, including High River, Lethbridge and Medicine Hat. As of Friday night, 25 neighborhoods in Calgary including most of downtown, were also evacuated. And they were without power after the city ordered the energy utility to shut it off in evacuated areas.