Houston has been experiencing below-average temperatures as a polar vortex ushers in cooler conditions across the state.

As a slug of polar vortex-fueled arctic air overtakes the eastern two-thirds of the U.S. next week, a storm system could ...

The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously ...

The colder-than-normal temperatures in Houston are part of a larger pattern of Arctic air sweeping through Texas and much of ...

DALLAS - Most of the nation is in good shape on Wednesday and will be warmer on Thursday. The arctic air is coming, but not ...

The unseasonable chill that has swept through the eastern half of the US defies last year's mild winters and the South's ...

Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into ...

when freezing temperatures in Texas lasted more than eight days, causing widespread power outages and killing more than 200 people. Regardless of whether the polar vortex contributes to a ...

Part of Mississippi under extreme cold warning after winter storm dropped snow across the Gulf Coast. When will temperatures ...