From the Wall Street Journal:

Ports are already swamped by record numbers of containers reaching U.S. shores during this year’s peak shipping season, and the number of vessels waiting for berth space at Southern California’s gateways is growing as logjams stretch into warehouses and distribution networks across the country.

Hundreds of thousands of containers are stuck aboard container ships waiting for a berth or stacked up at terminals waiting to be moved by truck or rail to inland terminals, warehouses and distribution centers. When the boxes do move, they are often snarled at congested freight rail yards and warehouses that are full to capacity.

The surge is being driven by Americans shifting their spending away from services, such as restaurants and vacations, to home improvements, office equipment and other consumer goods. Port leaders say importers are also stocking up on additional inventory after the shortcomings of just-in-time supply chains were exposed in the early weeks of the pandemic.