There was a SF-Fantasy series written by Randall Garrett and his wife, Vicki Ann Heydron - The Gandalara Cycle - that takes place on the dry bed of the Mediterranean. The books were written mostly by Heydron from an outline by Garrett, as he was in poor health at the time. Two modern people on a ship on the Med are blown back in time to inhabit Gandalaran bodies, it’s not until the last book that they realize they are in a dried up Med basin, and the water trickling over Gibraltar looks ominous. The series ends with the Gibraltar dam starting to break while the inhabitants are struggling to leave the basin. Haven’t read these books in a long time, but I remember them as good reads.
I remember those. They were pretty good, but it’s decades since I read them. I might not have read all of them, either.