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.

U.S. Treasury Secretary Janet Yellen is warning that the government will reach its debt limit on Tuesday and will need to take “extraordinary measures” to avoid risking a potentially catastrophic default.

Secretary says Treasury will suspend investments in two government employee benefit funds through March 14, to claw back borrowing capacity under the $36.1 trillion debt ceiling