How long will the extreme cold temperatures affecting millions of Americans last?

The extreme cold temperatures affecting millions of Americans are severe enough to potentially break records in areas like Wichita, Kansas City, and Oklahoma City, with temperatures 40 degrees or more below average. However, there are promising changes on the horizon. According to the weather specialist, when looking at the forecast for the next six to ten days, changes are expected that should bring relief from these frigid conditions. The current polar vortex and winter weather system won't be a permanent fixture.