HEBRON, Ky. — Amazon Prime Members are preparing to take advantage of major deals during Prime Day. But that also means Amazon workers are handling a major increase in traffic. And it means the Amazon Air Hub in northern Kentucky is moving hundreds of thousands of packages a day.

Mike Flannery is the regional director of hub operations at Amazon, and has been with the company for 15 years now. During his career, he’s witnessed a lot of growth in the organization, including Prime Day, which first started in 2015.

“I like to think of it as an Amazon holiday at this point,” Flannery said.

He says Prime Day makes for a busy week at the Amazon Air Hub, involving the processing of millions of packages in a week.

The technology on top of human labor makes for a quick and efficient turnaround to get packages to customers in a timely manner.

“It’s really amazing to see on a floor like this, how technology and people kind of intertwine and help deliver for our customers,” Flannery said.

Boxes get sorted and then placed into containers. The containers are different shapes and sizes that get organized into a perfect fit on to a plane. He says the northern Kentucky airport will send off flights as per usual, with Amazon workers monitoring everything from a control room.

“What will change is the amount of packages on the flight and the amount of density on the flight. We’ll see fuller flights, more demand, higher volume,” Flannery explained.

Flannery knows this week means big shopping for people. He’s seen the two-day event grow over time into the success it is now.

“When you sit back and think about all the things that we’ve done, not only in amazon but across amazon operations in the last 15 years—it’s been amazing,” he said.

Amazon said its 200 million Prime members in 25 countries around the world can enjoy the major deals for the two-day sale.