A month after the holidays, some people are still getting Christmas packages in the mail

(CNN) — It’s nearly February, and holiday packages and cards are still making their way to peoples’ doorsteps. The reason for all these delays? Like so much right now, the pandemic is partially to blame.

Americans took to online holiday shopping in record numbers, which inundated the system with what the USPS says is a “historic volume” of mail and packages. As a result, parcels, cards and other pieces of mail are sometimes taking more than a month to reach its destination. The USPS has so far delivered more than 1.1 billion packages mailed during the holiday season, a record number, it told CNN.

But at the same time, the Postal Service is facing other issues. More than 39,000 employees out of 644,000 have tested positive for Covid-19, a spokesperson for USPS told CNN, representing about 6% of its workforce.

ShipMatrix, a shipping operations software company, found that hundreds of thousands of parcels experienced delays of at least several days, with some taking even longer.

Customers in states like Pennsylvania, Maryland, New Jersey and New York also experienced some of the largest delays,due to heavy snow storms in December, ShipMatrix reported.

“Throughout the peak season, the Postal Service, along with the broader shipping sector, faced pressure on service performance across categories as it managed through a record of volume while also overcoming employee shortages due to the ongoing surge in COVID-19 cases, winter storms in the Northeast, as well as ongoing capacity challenges with airlifts and trucking for moving historic volumes of mail,” the USPS said in a statement to CNN.

Facilities are still working through backlogs

In Philadelphia, packages were “up to the ceiling” last month, local American Postal Workers Union president Nick Casselli told CNN.

“I’ve been in postal for 35 years, I’ve never seen what I’m seeing,” he said.

There were so many incoming packages that the postal workers couldn’t process them in time, Casselli said.

One month later, the processing continues, and residents in cities around the country have been commiserating about waiting for late holiday mail to arrive.

Kim Deyo in Pine Grove, Pennsylvania, told CNN affiliate that WNEP she mailed a package to her mother in another part of Pennsylvania on December 14. It was supposed to arrive later that week, but instead, it went on a joyride: from Jacksonville, Florida, to Tallahassee, and back up to Pennsylvania.

Ten days later, by the time Christmas rolled around, the package still hadn’t arrived. Ultimately, it arrived after the holiday, Deyo said.

In Tulsa, Oklahoma, James Seaman told CNN affiliate KJRH this week that he was still receiving holiday cards from Christmas that were originally mailed out a month ago.

“You can’t rely on getting things through the mail right now in a timely manner,” Seaman told KJRH.

And it’s not just gifts or cards. Bills are being affected, too.

In Pennsylvania, Kevin Thorne told CNN affiliate WPVI last week that his entire block still hadn’t received their electric bills.

“I’m never late for my bills, they’re going to make my bills late,” he said.

And that’s despite the fact that the Philadelphia processing plant hired more than 280 employees for the holiday season, USPS spokesperson Naddia Dhalai told WPVI.

The USPS isn’t alone in experiencing backlogs — FedEx and UPS have also warned customers of possible shipping delays.

“Record high volumes of e-commerce orders, COVID 19 closures and weather events may cause delivery delays,” FedEx’s website warns. In March 2020, at the beginning of the pandemic, UPS indefinitely suspended its Service Guarantee, which provides money-back guarantees on some shipping times, “in light of overall coronavirus uncertainties.”

Things will — eventually — go back to normal. As the USPS makes its way through the massive holiday inventory, the service “fully anticipates improvements in performance,” the USPS said in its statement to CNN.