Canada: Extreme deep freeze in Alberta, Saskatchewan and B.C.
A chilly Arctic high has spread -30 C degree temperatures across Alberta and Saskatchewan as it slips down from the north, but the winds are the greatest concern. Even though they aren't as extreme as the area experience during Monday's blizzard in southern Alberta, they are still strong enough to drive wind chills down into the -30s, -40s and even lower.
Overnight, most of southeastern Alberta and the southern half of Saskatchewan experienced wind chills in the -40s, with Medicine Hat right on the cusp at -40 C, Saskatoon reaching -43 C and Regina getting down to -46 C. However, it was Swift Current that had it worst of all, with wind chill values steadily dropping overnight until they reached -50 C just as the sun was rising.
Source: news.yahoo.com