With 2,300 pieces of equipment, 12-hour shift rotations, and literal tons of salt, the Maryland Department of Transportation (MDOT) is trying to make up for bad weather.

There’s a chance of snow this weekend before temperatures are expected to drop to the single digits next week due to a blast of arctic air.

Sunday is scheduled to drop as much as 2 to 4 inches of snow on the Baltimore area — right before temperatures plummet into the single digits Monday night.

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into next week, impacting millions of Americans in nearly all of the contiguous states.

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by treacherous conditions.

Much of the U.S. is being blasted by ice, snow and wind, as the polar vortex that dipped south over the weekend is maintaining its frigid grip.

A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped south over the weekend kept much of the country east of the Rockies in its frigid grip, making many roads treacherous,

On Monday, the wintry weather had made many roads treacherous, forced school closures and caused widespread power outages.

According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need to know.

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not seen in years.

Maryland and Virginia residents are preparing for a possibly significant winter storm that is expected to deliver heavy snowfall and dangerously low temperatures starting Sunday afternoon according to the National Weather Service (NWS).

The polar vortex of ultra-cold air usually spins around ... Brian Witte in Annapolis, Maryland; Julie Walker in New York; Joshua A. Bickel in Cincinnati; Jamie Stengle in Dallas; Jeff Martin ...