A larger Arctic air system across the U.S. has triggered an extreme cold weather warning in Texas, bringing subzero temperatures to some regions..

Wind chill temperatures are how cold people and animals feel when outside. It’s based on the the rate of heat loss from exposed skin caused by wind and cold, according to the NWS. Essentially, as wind increases, it draws heat from the body and drives down skin temperatures and internal body temperatures.

Dangerous cold weather impacts part of the U.S. You’ve probably heard your local meteorologist warning about how cold it’s going to get, then BAM, they mention the wind chill.