The bitter cold at Niagara Falls is part of a polar vortex onslaught of frigid air that's plagued the central and eastern U.S ...

International Space Station, where astronauts have lived and worked for 25 years, is visible to us on Earth. How to see it ...

Strong winds can make it feel a lot colder than the thermometer suggests. Protect yourself by covering exposed skin and ...

During the hot, humid summer months, meteorologists often discuss the heat index instead of the actual air temperature. But how is the heat index calculated, and why is it more important than the air ...

Mississippi is bracing for a major winter storm this weekend and freezing rain could be among the worst impacts.

Boston recorded 23.2 inches after the Sunday-into-Monday storm — placing it in the top 10 for highest storm totals on record.