A previous release said that service would be suspended for Nebraska, Kansas, Missouri.
"A record arctic air mass will remain over the central and eastern US over the next several days", the National Weather Service tweeted Tuesday.
Temperatures across Scotland expected to plummet as weather warnings continue
Pictures show accumulations of heavy snow on the runway, creating treacherous conditions for planes due to depart. Up to 10cm of snow could fall in some areas, particularly over Wales and southwest England.
Wednesday, the federal service says it will not deliver mail in all or parts of five Midwest states because of a risky Arctic air blast.
University of South Dakota and South Dakota State University cancelled classes for Wednesday. Unsafe wind chills of -20 to -30 are expected. This includes mail pickup from businesses or collection boxes.
Venezuela's Maduro Rejects 'Imperialist' Demands for New Election: 'Wait Until 2025'
Despite an offer of amnesty to those who disavow the socialist leader, the military high command remains loyal to Maduro. The Supreme Court, stacked with Maduro loyalists, has approved a preliminary investigation into Guaido's activities.
Retail offices will be open.
Postal delivery operations will be suspended also in Iowa and western IL.
Arrival of Russian passenger jet fires up Venezuela's rumor mill
30 that he is willing to negotiate with his opposition after opposition leader Juan Guaido called for new street protests. Venezuela was put on the highest USA level advisory, a list that also includes Syria, Afghanistan, and Iraq.
13 NEWS has confirmed with the USPS that delivery service will still occur in all of Kansas.