So update. My fiance got to Paris yesterday around 8 AM. While waiting for their flight to Vienna they walked around Paris a bit, saw the Mona Lisa and other art. They got to Vienna around 6 PM our time, and by the time they got to their apartment, the entire city was shut down. Schools, museums, bars, restaurants, everything. I asked her if they were thinking of coming home, but at that time it was ~2 AM their time so she went to bed. In that time, Trump announced the border closure effective Friday, so I sent her a message that when you wake up, please work on getting out of the country and working your way back. Some probable panic, and worry later, they got to London this morning at 7:11 AM our time, and they are booked to leave in the morning their time (they are sleeping now, and will be heading to the airport when they wake up) but should be back state side in San Fran ~8 AM, and back in Utah around 10 AM. So that is good news. I have no idea if they will have to be screened or not when they arrive in California.
....Sorry that was probably more confusing than it needed to be, but yeah...