Walker hoped the box of produce, canned goods and other groceries she left a Georgia food pantry on Wednesday would help fellow employees at Hartsfield-Jackson Atlanta International Airport. Walker, a board member of the union representing Georgia's TSA employees, said she was willing to give employees the food pantry in Conyers.
With the shutdown in her fourth week, furloughed federal employees struggle to cope with life without a paycheck has turned to food banks and food pantries to feed their families, according to several organizations across the country.
Calls from anxious workers have been poured into agencies, and some of them are bracing for what they expect will be an increased demand for food at a time when donations are typically low. Some organizations are already seeing a spike.
Over the past two weeks, more than 280 federal employees have used a food bank that operates the Catholic Community Services of Northern Utah, which is a 50% increase over the 566 regular clients who used services during that time, according to the organization's director, Maresha Bosgieter.
"We might have to make the amount of the food baskets smaller if it continues, but our doors will remain open, "said Deborah Nielsen, the program coordinator and case manager.
Most of the federal employees who used the Joyce Hansen Hall Food Bank, which is open four days a week, work for the Internal Revenue Service, Bosgieter said.
The idea for pop-ups was made early, said the group's president and CEO Radha Muthiah. ups came after the food bank saw a surge in calls from furloughed government workers, contractors and others to a helpline in the past two weeks, said Muthiah, whose organization partners with more than 400 groups in Washington, DC, Maryland and Virginia 
'There's just a little bit of shock'
Muthiah said more than 50 calls a day from furloughed employees, contractors and others poured into the food bank's Hunger Lifeline, near food pantries over the past two weeks. That's a roughly 15 to 20% increase in call volume over the same time last year, Muthiah said.
In the past few weeks, the organization has noticed people calling the hotline who have never called a food bank before, seeking guidance.
Muthiah said one woman who attended the pop-up market said she had held food drives for a nonprofit and never imagined she would have to rely on a food bank.
"I think there is just a bit of shock and surprise that they're in these circumstances," Muthiah said.
Muthiah recalled another furloughed worker who wanted to work for her food and volunteered to pack the produce at the food bank.
"I felt like I should do something to earn it," she recalled the woman saying.
Capital Area Food Bank typically provides about 3 million meals in the month of January, Muthiah said.
Based on the increased call volume to the hotline and attendance at pop-up markets, the organization said it anticipates it will have to provide up to 600,000 more meals – a 20% increase – specifically for federal workers and contractors this month, she said.
"Food is fundamental, and we hope that resolution can come sooner rather than later so people can go on with their lives," Muthiah said.
Linda Alexander, operating director of the Three Angels Food Network in Conyers, said they expect more federal employees to seek their services this week. About 30 out-of-work federal employees called the food pantry for help over the past several days, which is unusual, Alexander said.
"They're saying 'I'm going to need some help this week with making sure my kids get fed,'" Alexander said.
She said the nonprofit is trying to prepare for the increased demand.
"We have donations available based on our trending data, and this is an anomaly," Alexander said. "We are trying to source food from other distributors that we usually deal with because we anticipate …. this is going to manifest itself in a real way."
She added: "We will to the very best that we can. We believe that we can marshal some additional resources. "
Walker, the secretary-treasurer of the American Union of Local Government Employees, said she has been working without pay since late December, like many of her colleagues. She has cut out spending money and has reached out to her mortgage company and creditors asking them to work with her.
She went to Three Angels Food Network to pick up goods and get information for union members at the request of her local president.
She did not reach her breaking point but said she would turn to the food pantry for help. "I'm not too proud. Everything in there I could use," Walker, 57, said.
Help from all corners
From large to small efforts, others have also stepped up to feed employees affected by shutdown.
Andrés and his nonprofit served millions of free meals after natural disasters, including Hurricane Maria and the California Wildfires
At some food pantries, furloughed workers have left with more than just food but direction and peace.
Nielsen said she has encouraged federal workers who come to her pantry to also apply for unemployment and work out a plan with their creditors.
On Tuesday, she gave two inflatable toboggans shaped like bears to two government workers who came with their children.
"This will give us something to do during shutdown and get our minds off it," she remalled them saying.
CNN's Lauren DelValle, Keenan Willard, Amy Chillag and Joey Hurst contributed to this report.