Winter temperatures increased by 3.8 degrees Fahrenheit on average since 1970 in these warming locations. Winters in the fastest-warming cities have warmed by as much as 7 degrees. The Northeast and Upper Midwest are the regions warming fastest, and are running a nearly 5-degree winter fever. This includes some ski towns like Burlington, Vermont, (7.7 degree increase) and Concord, New Hampshire (6.6 degree increase). Winter in notoriously cold Milwaukee is now 6.7 degrees warmer on average. For many, a little extra winter warmth may sound nice. But milder winters come with consequences. “Wintertime plays important roles in the life cycles...