Extreme flooding in Calgary, Canada on Saturday (June 13) left cars partially submerged on a highway and a man trapped, standing on the roof of his car.

The filmer, Akbar Ali told Newsflare: "It feels apocalyptic. The city was turned upside in a matter of 25 minutes. From a nice sunny day to dark clouds, wrecked cars and houses, and floods everywhere.

"Within minutes, it was hailing the size of tennis balls, and water was pouring down as we had never seen before."

According to local media, emergency crews used rescue boats to help drivers and their passengers out of the floodwaters.

A rainstorm that lasted maybe 25 minutes, did this to my city! I was out with my friends and we saw some some clouds ensue. Within minutes, it was hailing the size of tennis balls, and water was pouring down like we had never seen before. The moment it ended, we stepped out and it felt apocalyptic - we could hear dozens of sirens, cars floating around, property destroyed...it was incredible.

One thing my friends and I all said afterwards, was that it feels apocalyptic. the city turned upside in a matter of 25 minutes. From a nice sunny day to dark clouds, wrecked cars and houses, and floods everywhere.