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A bitter cold is gripping parts of central and eastern Canada today as temperatures dip to -45 C with the wind chill in some areas. Environment Canada has issued extreme cold warnings for provinces from Manitoba to New Brunswick. The national weather forecaster says temperatures could fall to -45 C in Ottawa today with the wind chill, warming up to -35 C overnight. In New Brunswick, temperatures are expected to hover between -35 C and -40 C with the wind chill until Sunday. Quebec and Manitoba can expect much of the same, with temperatures warming up early next week. Meanwhile, Newfoundland is bracing for a winter storm that could bring up to 20 centimetres of snow to eastern parts of the island today.