A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

The phenomenon, which blasts Arctic air across parts of North America, can disrupt weather patterns. According to the Windy weather map, temperatures are currently freezing or below in most of the ...

20 of the most vulnerable hot spots were home to permafrost, which is rapidly thawing around the Arctic, with others being boreal forests ... data and long-term temperature records around the world to ...

Map of areas that experienced ecosystem climate stress in the Arctic-boreal region ... data and long-term temperature records around the world to determine how vulnerable ecosystems are in ...