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People in Waterloo Region can expect to brace themselves for one more day of frigid temperatures and windchill warnings in Waterloo Region before temperatures gradually return to more seasonal values later in the week. (CBC file photo)

Environment Canada says an Arctic air mass over Southern Ontario will keep Waterloo Region in the deep freeze until Thursday before temperatures get closer to seasonal values later in the week.

The weather agency says a combination of a strong low pressure area over Hudson Bay and a strong Arctic high pressure area over the U.S. Midwest is producing strong and frigid winds across most of the province. 

Temperatures will hit an overnight low of – 15 C with a wind  chill value of – 25, before warming up to a high of – 6 C on Thursday.

A snow squall warning has been extended for the Guelph, Erin, Wellington, Arthur and Mount Forest areas after the weather agency forecast blowing winds on Wednesday.

A wind chill warning that had been in place for Waterloo Region, Guelph, Erin, Wellington, Arthur and Mount Forest areas ended at around 10:30 a.m.