请密切关注天气情况,做足保暖措施,防止冻伤。& l( |1 o. `* Y; a5 t Q
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. 1 ^# h& l y0 {' e# _ ) }- l9 s/ ?4 r2 kAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.