Per AP and local news outlets: Flights to LAX halted due to air traffic controller shortage
The gist: FAA ordered a halt to flights departing to Los Angeles International Airport (LAX) this morning just before noon, due to staffing shortages (ATC staff calling in sick) related to the ongoing US federal government shutdown. (It appears that outbound departures from LAX were not impacted.) Aircraft scheduled to depart other airports and traveling to LAX have been ordered to hold position and not takeoff. Presumably this would include any direct flights from Europe to LAX, as well as all domestic arrivals. The FAA is projecting they will remove the ground-stop around 1:30 pm and allow all inbound flights to proceed then. Expect some delays throughout the day as there will be backlogs to clear out and delays at major airports like LAX can ripple through the system and cause delays elsewhere.
As the US federal government shutdown continues (with no sign of any resolution in sight), expect more of this coming up. I've got flights in early November (thankfully, with no tight connections), but I'm avoiding airports through the peak holiday season - if ATC staffing issues continue through Thanksgiving, it's not going to be pretty.