TODAY | June 22, 2013
>> further north in canada, the opposite problem, torrential rains caused the worst flooding in decades. it's so severe the entire downtown of alberta's biggest city, calvary, has been evacuated.
>> reporter: more than five inches of rain in 24 hours sent rivers and creeks surging over the banks. the water rose so fast, it caught police off guard. residents scrambled to get out.
>> our cul-de-sac had a little water. went for a cigarette, came out and there was a river going down the road.
>> reporter: families separated during evacuations reunited.
>> a good feeling.
>> reporter: in the high river , floodwaters swept away kevin's pick-up truck forcing him to safety. homes washed away. more than 75,000 calvary residents evacuated. the entire downtown shut down and gas and power shut off.
>> the streets of so many communities empty of people and full of water. to think of the thousands of people who have been displaced. it's incredible how we come together in times like this.
>> reporter: with more rain in the forecast, some areas may be inaccessible for days. for "today," john yang , nbc news, chicago.