The northeastern US has been gripped by severe and hardened cold. Consider, for a moment, how much colder 20 ºF feels than 60 ºF. Imagine that difference projected past its original low point, out the other side to -20 ºF. After past winter temperatures like these, I can attest that the return to “normal” winter really does feel 40 ºF warmer. The rivers and lakes are freezing. The snow is a dry powder, dozens of degrees below its melting point. A warm home above the frozen waters sounds pretty inviting.