As the Baltimore-Washington International Thurgood Marshall airport braces for their highest amount of outbound passengers Saturday, officials suggested travelers arrive at least four hours early amid decreasing security agents’ attendance as the government shutdown continues.

Jonathan Dean, a spokesperson for BWI, said the airport is projecting around 30,000 people will travel out of the airport on Saturday. The security line began at door 1 around 8:30 a.m., snaking three times up and down the terminal until travelers entered the airport through door 10.

As travelers entered door 10 just before 9 a.m., a woman asked, “How long?” It would be another hour in a line she’d already been in for an hour — a two-hour long line on the sidewalk outside of the airport terminal.

“Noted,” the woman said, sounding slightly defeated. The line inside was no shorter, though warmer. An airport worker asks if everyone was flying Southwest or American Airlines and if so, “unfortunately, you’re in the right line.”

Airport and airline officials passed down water to passengers in line. A speaker blasted loud music near the Concourse C entrance as workers sing along. Those most impacted by long lines were at Concourses A, B and C, officials said.

“We have not previously experienced checkpoint wait times similar to what we are seeing this morning,” officials said in a post on social media.

Travelers braced the cold as they stood outside BWI airport for security screening ahead of spring travel.

Massive lines snaked outside the airport for the third time this week as travelers continue to arrive three hours ahead their departure. Parents began sending their children inside for warmth as they waited in line to Concourse C amid the morning’s 30-degree temperatures in Maryland.

An odor at a shared air traffic control center for the second time this month caused a brief ground stop at BWI, Reagan National Airport and Dulles International Airport Friday evening, according to the Federal Aviation Administration. The FAA did not immediately respond to requests for more information regarding the issue.

The sudden ground stop exacerbated travel woes as several TSA agents across the country continuously called out amid the DHS shutdown that cost them a month of missed pay.

Thousands of unpaid Transportation Security Administration workers are calling out and more than 500 have quit, according to the Department of Homeland Security.

President Donald Trump signed an executive order on Friday to pay TSA workers as early as Monday.

Martin Louamou, from BWI operations, has been outside directing foot traffic since 3 a.m., holding a sign that says “end of the line.” He gives people the unfortunate news that the line, snaking three lines deep along the sidewalk, is 3-4 hours long to the gate.

People are being polite, and the line keeps moving, but “they are worried they are going to miss their flights.” He said all he can tell them is to check with their airlines.

The U.S. Senate approved Homeland Security fund early Friday that would pay TSA agents, but House Republicans rejected the measure. The deal did not include immigration enforcement operations at the heart of the budget impasse.