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

Here's the latest on the winter storm. A historic winter storm is poised to produce potentially record-breaking snows from ...

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 ...

DALLAS (AP) — An area stretching from Texas to Tennessee braced Wednesday for the possible arrival of freezing rain and snow even as some other parts of the U.S. hit by the plunging polar vortex ...

An area stretching from Texas to Tennessee braced Wednesday for the possible arrival of freezing rain and snow even as some other parts of the U.S. hit by the plunging polar vortex this week ...

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.

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 ...

A winter storm sweeping through the U.S. South on Tuesday was dumping snow at levels millions of residents haven’t seen before. Moisture from the Gulf of Mexico was combining with a low-pressure ...