1. Get ready for the deep freeze.

The bomb cyclone is gone, but it left a mess of snow in its wake along the East Coast. The authorities said at least seven fatalities appeared to be connected to the weather. Above, a scene in Boston.

And now it’s going to get very, very cold. Arctic air will create wind chills well below zero in many places. Among the most extreme: atop Mt. Washington in New Hampshire, which could feel like 100 degrees below zero.