Yes, Ft. Smith, Ark. Reportedly, some didn't want to leave. The Astrodome wasn't considered safe if it took a direct hit.
My understanding was that the Astrodome itself had already been emptied, through placement of refugees into more permanent living arrangements, and that a few thousand refugees were left in the adjacent Reliant Center. Those from the Reliant Center are the ones recently shipped up to Arkansas.
On an unrelated note, the northward jog I saw on the last few satellite frames of Rita is getting more pronounced now.