WINNIPEG - Manitoba is being hit with high winds and blowing snow that are crippling everything from mail delivery to highway travel and airline flights.

Wind gusts of up to 90 km/h are kicking up piles of snow already blanketing the province, creating whiteout conditions and delaying flights out of Winnipeg.

Manitoba RCMP say there were more than 30 collisions by mid-morning and Environment Canada issued a blizzard and cold warning.

Major highways, including the Trans-Canada, are closed although most border crossings to the United States remain open.

The Winnipeg zoo -- home to a number of hardy polar bears used to arctic temperatures -- has even closed its doors due to the weather.

Canada Post says some customers may not receive mail today because the snow is making delivery difficult.