The New Year's attack in New Orleans marks the fourth mass killing linked to perpetrators inspired by ISIS The FBI confirmed ...

Snow squalls bring hazardous travel with near-zero visibility, triggered by Arctic air mixing with warmer temperatures.

A winter storm is expected to bring snow, ice and severe weather to portions of the Plains and mid-Atlantic beginning this weekend.

Large explosive eruptions occur in Yellowstone around once every 700,000 years, according to the U.S. Geological Survey.

Bitter temperatures are forecast to hit swathes of the U.S. this weekend as a polar vortex—the area of cold air that ...