请密切关注天气情况,做足保暖措施,防止冻伤。 : W. e4 Y3 M: A( U# DA very cold Arctic airmass and winds of 15 to 20 km/h will generate wind chill values below minus 40 across much of Alberta tonight. Conditions will improve somewhat by Sunday afternoon as temperatures rise." Q: A! A3 F4 Z3 W9 @
6 o* ]! q1 |( M) M" BAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.