Polar Vortex


Published first in Quartz Welcome to the era of extreme weather. If you live in the US Midwest, you’re likely accustomed to laughing in the face of winter snow, ice, and freezing winds. But even the hardiest Midwesterner isn’t used to temperatures (including wind chill) falling below -50°F (-45°C); that’s because those are numbers that haven’t been seen in decades. The last time Chicago was this cold, Ronald Reagan was US president, the Berlin Wall…