WASHINGTON, DC (WUSA) — Metro has suspended all above ground metro stations and all bus services starting at 1 p.m. due to the heavy snowfall covering the third rail.

A metro press release explains, “The third rail must be clear of snow and ice because it is the source of electricity that powers the trains.”

Bus service has been suspended because of safety concerns as the roadways become increasingly impassable. This includes Metro Access, but round trip returns will be honored. National airport has also been shut down.

Underground Metro Service is running as follows:

Yellow Line – Service from Pentagon to Crystal City only

Red Line – Service between Medical Center and Union Station only

Orange Line – Service between Ballston and Stadium-Armory only

Green Line – Service between Fort Totten and Congress Heights only

Blue Line – Service between Ballston (extended to Blue Line) and Stadium-Armory only