A polar vortex on the way is expected to make temperatures in every state drop below freezing by next week.
The National Weather Service says a polar vortex is a large area of low pressure that comes in from the North and South Poles.
It's expected to push a blast of cold air through the country starting in the upper midwest.
Wisconsin could see temperatures 25 degrees below zero on Sunday.
Warmer places like Atlanta are predicted to see a low of 19 degrees by Monday morning.
The NWS says if that happens it'll be the coldest temperature the city has seen in three years.
