The union that controls US east coast ports will strike tomorrow (
source), as ongoing negotiations have failed to produce an agreement for requested wage increases. I have not seen this story on any mainstream media webpages that I check. Have you?
It is unclear how quickly the situation will be resolved, but what is clear is that roughly half of all imports to the country flow through these ports, and rerouting ships to the other side of the country, where ports are already operating at capacity, is not an option.
While it is possible that this will be resolved soon (potentially even before the strike begins), there is a possibility that the strike will continue for long enough to seriously--if unevenly--disrupt the supply chain for a variety of needed products. Be prepared for unexpected delays and price surges on seemingly random things until this is resolved, and for unexpected endurance of problems as cascading effects flow through the system.