Failing to raise the debt ceiling by the deadline could pause paychecks to federal workers, Medicare benefits, military salaries, tax refunds, Social Security checks and more, CNN notes.

What they’re saying: “It would be catastrophic to not pay the government’s bills, for us to be in a position where we lacked the resources to pay the government’s bills,” Yellen said in an interview on CNBC.

“I fully expect it would cause a recession as well,” she added.

Catch up quick: Yellen last week told House Speaker Nancy Pelosi that the U.S. would likely begin to default on its loans after Oct. 18 if Congress failed to take action on the debt ceiling by that date.