Police said numerous homes were damaged, and while they initially said there were reports of injuries, Cpl. Gina Slaney later said there were no known injuries as of yet.
Dean Allan, deputy mayor of Carstairs, said the twister passed between Didsbury and Carstairs, damaging 12 homes.
“A couple of them were completely destroyed. There’s no deaths -- just some minor injuries, luckily,” Allan said, adding some livestock was also lost.
“All in all, everything went well, or as good as can be for something like that.”
Carstairs fire chief Jordan Schaffer said five homes were completely destroyed, including one where rescuers had to extricate a woman from her basement.
“Digging through debris, we were able to get her out without a scratch,” Schaffer said.
“The house was 100 percent gone.”
Lisa Arrowsmith, a former Canadian Press reporter, was driving south on Highway 2 towards Calgary with her husband on Saturday afternoon when she said the sky got dark and they could see a very large funnel cloud to their right.
“The thing that came to my mind is we either have to turn around and drive as fast as we can the other way, or we have to try to outrun this,” Arrowsmith said, although she explained that turning around on the divided highway would have been next to impossible due to barriers.
“You make a split-second decision, and we just thought, well, we'd better just floor it and hope for the best.”
She said many people had pulled over to shoot video of the twister. But she kept the pedal down and after some hail hit the car, they knew they were finally in the clear, she said.
“It was very frightening to think maybe you were going to get caught on the highway with nowhere to hide and nowhere to seek shelter,” she said.
In the video, he calls out to anyone who might be in one of the homes, but is prevented from getting any closer due to downed utility lines blocking the driveway.
Fortis Alberta, which supplies electricity in the area, reported outages in both Didsbury and Carstairs on Saturday afternoon.
Tanya Croft, a spokeswoman for the utility, said late in the afternoon that crews were still assessing the damage but that she believed most service had been restored.
The Town of Carstairs posted on Facebook that water-use restrictions were in effect, and would remain so until electricity was restored.
“As officials continue to monitor the situation, please stay safe,” Trudeau said on Twitter.