A nationwide business shutdown and surge in U.S. government spending will nearly quadruple the federal deficit to a record $3.7 trillion this fiscal year as the country combats the coronavirus pandemic, congressional forecasters said on Friday.

U.S. gross domestic product will plunge by nearly 40% on an annualized basis in the second quarter, according to the nonpartisan Congressional Budget Office. But the CBO forecast an economic resurgence in the second half of the year, and said unemployment would crest at 16% but remain in double digits throughout 2021.

The CBO report illustrated the fiscal pressures lawmakers in Congress face as they prepare to craft new legislation to respond to the pandemic. Congress has already passed $3 trillion in spending on healthcare, small businesses and other measures to combat the outbreak and its economic effects.

“If the laws currently in place governing spending and revenues generally remained unchanged and no significant additional emergency funding was provided, the federal deficit would be roughly $3.7 trillion in fiscal year 2020 and $2.1 trillion next year,” the CBO said. In March, the CBO projected deficits of just over $1 trillion in each of those years.

The federal debt would equal 101% of GDP by Sept. 30, when the 2020 federal fiscal year ends, and would grow to 108% by the end of fiscal 2021, CBO said.

The agency predicted real GDP will decline 5.6% in 2020 and then grow 2.8% in 2021. But economic activity for 2021 would still be 6.7% below a projection the CBO issued in late January.

The CBO’s Jan. 28 forecast, before coronavirus roared through the United States, saw the economy remaining vibrant through this presidential election year, partially due to strong consumer spending.