MADISON (WKOW) -- UPS trucks are out Thursday hoping to deliver to angry customers.
The shipping giant's backlog left some Americans with gifts missing from under the Christmas tree Wednesday.
"We're terribly sorry," spokeswoman Natalie Black told CNN.
UPS wasn't alone. FedEx was late with some deliveries as well.
"We're sorry that there could be delays and we're contacting affected customers who have shipments available for pickup," FedEx spokesman Scott Fiedler told The Associated Press on Wednesday.
According to CNN, UPS did some package sorting Wednesday, but the company stuck to its plan to make no deliveries on Christmas to give drivers the holiday break.
Both shipping companies noted they were handling hundreds of millions of shipments in a compressed holiday shopping time frame, because Thanksgiving was later than usual this year.
Other issues they say was weather in some areas, and more online consumer shopping last minute for the holiday season.
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