Treasury secretary Janet Yellen, in one of her final major acts in office, warned Congress late Friday that the Treasury will need to begin "extraordinary measures" on Tuesday to avoid hitting the debt limit.

In one of her last acts as Treasury Secretary, Janet Yellen says her agency will start taking “extraordinary measures,” or special accounting maneuvers intended to prevent the nation from hitting the debt ceiling,

The day after President Donald Trump takes office, the U.S. Treasury said it will employ "extraordinary measures" to avoid hitting the debt limit. In a letter, outgoing Treasury Secretary Janet Yellen said extraordinary measures would begin Jan.