State has put up a message on its website urging individuals with pending appointments to not attend. They will not be permitted to enter the building.
Some applicants claim to have received a similar message from State by email within the last hour, but thus far my family has not been contacted.
I'm planning to call Embassy Abu Dhabi when their phone lines open at 11pm ET tonight (the start of the Arabian workweek), even though I fear that they may not know much themselves about how this is going to play out. I imagine I won't be the only angry taxpayer demanding answers.