Okay so I’ve seen people talking about 1983 alternative universe but I haven’t seen anyone mention Night Vale’s Russian Sister City: Nulogosork.
Nulogosork got stuck in 1983, remember? Night Vale kept sending letters but Nulogosork’s replies were always in 1983 until they lost contact in 1997 (for NV anyway). Apart from the fact that according to a Night Vale Journal Article in a submarine that turned up, Nulogosork was destroyed by an atomic bomb in late September 1983. But Cecil found the article for the same date (Sept 24th) and it was a completely different headline.
There’s definitely an alternative universe that ended, or was at least partially destroyed, in 1983 and some of the wreckage is leaking through into Night Vale. I wanna analyse it more later with other episodes mentioning alternative universes, but I want to point out now that it has something to do with the sea. Ash Beach with a mysterious sea brings memories, a seafaring submarine arrives impossibly in the Sand Wastes. The sea is washing up bits of a world that ended in 1983.