Greenland plays an outsized role in the daily weather experienced by billions of people and in the climate changes taking shape all over the planet.

Frigid air that normally stays trapped in the Arctic has escaped, plunging deep into the United States for an extended visit that is expected to provoke teeth-chattering but not be record-shattering.

Meteorologists forecast a strong snow and ice storm followed by brutally cold conditions will soon smack the eastern two-thirds of the United States.

A surprising study of temperature-related deaths in Mexico upends conventional thinking about what age group is hit hardest by heat.