UPS announced that some presents will not make it on time this Christmas after a high volume of packages overwhelmed the world's largest parcel delivery service. "The volume of air packages in our system exceeded the capacity in our network as demand was much greater than the forecast," UPS spokeswoman Natalie Godwin said Tuesday in a statement. "As a result a small percentage of packages was delayed and will not be delivered today, Tuesday, Christmas Eve." Although UPS drivers were out delivering packages on Christmas Eve, but they will not be working on Christmas Day. Godwin said the majority of the packages not delivered by Tuesday night will be delivered on Thursday. She added that the company would have additional employees at its international air hub in Louisville, Ky., on Christmas night to prep the shipments. Many North Texas families are still waiting for long-delayed deliveries from UPS, NBC DFW reported.