And we’re not talking about the ice baths its athletes are taking in the wake of the Winter Games… Much of the US is set to shiver through freezing conditions as a high-pressure system pushes a blast of Arctic air from Canada across the country this week, bringing chilly winds and snow. After temperatures dropped 12-25C across the northern states yesterday, the mercury is set to sink deep into minus territory as the polar air is pushed further south and east. Forecasters say more than 70% of the US mainland will be hit with below-freezing temperatures, with more than 15 million Americans experiencing temperatures of circa -20C. We’ll take our wet summer, thanks…