Due to winter storm conditions, USPS, Amazon, and FedEx have closed facilities across the country.

If you’re hoping for a last-minute Christmas gift to arrive on time, you might be disappointed.

Amazon, the US Postal Service, UPS, and FedEx have all issued warnings that the winter storm that has hit large swaths of the country is disrupting operations in the final days before Christmas.

“FedEx Express experienced substantial disruptions at our Memphis and Indianapolis hubs last night due to severe winter weather that has been moving across the United States,” the company said in a statement Friday morning. “FedEx is committed to provide service to the best of our ability.”

FedEx informed US customers that packages scheduled for delivery on Friday or Saturday may be delayed. UPS stated that its delays may be more localized.

“Significant weather events across several regions of the U.S. are impacting the UPS Air and Ground network, including UPS hubs in Louisville, Kentucky and Rockford, Illinois,” according to UPS. “As a result, some delivery and pickup services in these areas will be affected.”

According to the US Postal Service, the storm has forced the closure of 89 post offices, including 53 in South Dakota, 20 in North Dakota, six in Nebraska, and five each in Minnesota and Iowa.

It did request that customers clear snow and ice from sidewalks, stairs, and mailboxes to assist letter carriers in making deliveries.

Amazon has also announced that some of its facilities will be closed due to the storm. It stated that employees at the facilities would be compensated for canceled shifts.

“Out of an abundance of caution, we’ve temporarily closed some of our sites in the impacted areas,” said Amazon spokesperson Barbara Agrait. “We’ll continue monitoring weather patterns and will reopen sites and resume operations when it’s safe to do so.”

During this busy week for holiday travel, the storm has also impacted passenger flights and other modes of transportation.

More than 3,000 passenger flights to, from, or within the United States scheduled for Friday had already been canceled by 8 a.m. ET, according to flight tracking service FlightAware.