Environment Canada issued a critical alert on Sunday evening saying that a rotating thunderstorm — that could produce a tornado — is travelling northeast of Edson. "This dangerous storm is likely producing very large hail, and may produce a tornado over the next 30 minutes," the alert says. The agency advises to "be prepared to take shelter immediately in a basement or reinforced structure if a tornado develops." Get low and put as many walls between yourself and the storm as possible. If you are on the highway and cannot avoid the tornado, seek shelter in a ditch or ravine."

Source: CBC News August 22, 2016 03:12 UTC