The rapidly spreading omicron coronavirus variant is increasing worker shortages along the global supply chain but has yet to substantially disrupt port operations, a Biden administration official said Wednesday.

“As we stand here today, the ports and the supply chain are operating at record levels,” said John Porcari, the port envoy for the White House’s supply chain disruptions task force.

The December holiday season is forecast to break spending records, according to the National Retail Federation, and the White House says consumers received 97%-99% of packages on time or with minimal delays from the U.S. Postal Service, FedEx and UPS.

But Porcari would not say that the worst of pandemic-related supply chain pressures are over.

“It’s hard to tell if the supply chain pressures have peaked,” he said.

Los Angeles County, home to the two largest container ports in the U.S., has seen a massive uptick in COVID-19 cases that threatens to disrupt operations at the ports of Long Beach and Los Angeles in the coming weeks.