Environment Canada has issued extreme cold warnings for a number of regions in the Southern Interior.
It issued a warning for Merritt late Wednesday morning in anticipation of temperatures dropping to minus 35.
Environment Canada says people who should pay special attention to the warning include the homeless, outdoor workers, seniors, people with medical conditions such as diabetes and people who consume excess alcohol.
Extreme cold warnings have also been issued for Chilcotin and Elk Valley.
The thermometre dipped to minus 23 in the parts of the Okanagan Wednesday morning, however, there has been no extreme cold warning issued for the valley.
It dipped down to minus 23 in Kelowna and Vernon overnight Tuesday.
The record low for Kelowna was set in 2009 when it dipped down to minus 30.
The record low for Vernon was set in 2007 when it plunged to minus 33.