The Office of Personnel Management announced Friday night that all federal offices in the Washington, D.C. area would be closed on Monday. The announcement comes ahead of a major winter storm forecast to deliver severe impacts to the region through the weekend.

According to the Office of Personnel Management, roughly 279,000 federal employees work in the D.C. area.

The notice says that "maximum telework" would be in effect, and federal employees who are ineligible for telework will receive weather and safety leave. Emergency employees will report to work unless notified otherwise.

OPM Director Scott Kupor said in a message on X to federal employees, "We hope that everyone stays safe (and warm) over the weekend."

-ABC News' Nicholas Kerr

With a massive winter storm on the way, more than 8,300 flights have been canceled through Sunday -- and the numbers are expected to rise.

On top of more than 640 flights canceled Friday, FlightAware is reporting nearly 3,100 flight cancellations for Saturday and more than 4,600 on Sunday.

Dallas-Forth Worth leads as the airport with the most canceled flights this weekend.

More than 2,300 flights within, into or out of the U.S. scheduled for Saturday have now been canceled ahead of the storm, with Dallas' two airports hit the hardest.

One of the biggest dangers from this storm is ice in the South.

The worse of the ice could hit Dallas; Little Rock, Arkansas; Memphis, Tennessee; Nashville, Tennessee; north of the Atlanta area; Charlotte, North Carolina; Raleigh, North Carolina; Roanoke, Virginia; and Washington, D.C.

Up to 1 inch of ice or even more is possible in some parts of Mississippi and western Tennessee, which could paralyze roads for days.

The ice could cause widespread power outages, leaving many without heat, and create very dangerous travel conditions. People should be very cautious about driving this weekend and through next week because the slippery conditions could last for days.

-ABC News’ Kyle David and Dan Peck

This weekend’s massive winter storm brought 10 to 20 inches of snow to the Plains and the Northeast and dangerous sleet and freezing rain to the South, crippling travel.

As the snow ends Monday morning, nearly 270 million people across the central and eastern U.S. are under alert for dangerously cold temperatures.

In the South, the wind chill -- what temperature it feels like -- dropped Monday morning to minus 3 degrees in Dallas, 7 degrees in Austin, zero degrees in Little Rock, Arkansas, and 2 degrees in Nashville, Tennessee. Dallas, New Orleans and Austin may hit record low temperatures on Monday, and that brutal cold will continue into Tuesday.

In the Midwest, the Monday morning wind chill is hitting a dangerous minus 27 degrees in Minneapolis and minus 14 in Chicago.

And for the Northeast, the wind chills will see a major drop on Tuesday morning to minus 4 in Washington, D.C., minus 3 in Boston and minus 18 in Pittsburgh, Pennsylvania.

-ABC News' Daniel Manzo