From USA TODAY.

A powerful nor’easter rapidly intensified early Monday as it pummeled much of the Northeast with heavy snow, grounding flights, shuttering schools and knocking out power to hundreds of thousands of homes and businesses.

Over 40 million people were under blizzard warnings from Maryland to Maine as the storm brought snowfall rates of 2 to 3 inches per hour and winds up to 70 mph, according to the National Weather Service.