请密切关注天气情况,做足保暖措施,防止冻伤。4 q9 s8 p; q/ u$ n5 a9 D
A 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. & n! K6 {$ P6 p' k) n" S6 B* J+ C4 ]- U. Y
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.