Hurricane Ian: DeSantis Says This a 500 Year Flood Event Major ports and rail facilities across the US Southeast have halted operations as one of the strongest hurricanes to ever hit the country heads north, causing disruptions along the way and resulting in another blow for already-strained supply chains. Jacksonville, the largest container port in Florida and a main trade gateway for auto shipments, shut down Wednesday and will remain closed until the Coast Guard authorizes operations to resume, spokesperson Chelsea Kavanagh said in an emailed statement. The hub is “on standby to assess any damage and reopen port facilities as soon as possible,” she added.