“Aparently The Salton Sea was once part of an inland water network. It was called Lake Cahuilla by Native Americans.”
“Lake Cahuilla was created when the lower Colorado River shifted its course within its delta. Instead of flowing directly south to the head of the Gulf of California, the river’s waters were diverted northwest into the Salton Basin, the base of which lay about 80-metre (260 ft) below sea level.”
https://en.wikipedia.org/wiki/Lake_Cahuilla
“The modern sea was accidentally created by the engineers of the California Development Company in 1905. In an effort to increase water flow into the area for farming, irrigation canals were dug from the Colorado River into the valley. Due to fears of silt buildup, a cut was made in the bank of the Colorado River to further increase the water flow. The resulting outflow overwhelmed the engineered canal, and the river flowed into the Salton Basin for two years, filling the historic dry lake bed and creating the modern sea, before repairs were completed.”
https://en.wikipedia.org/wiki/Salton_Sea
Neither had anything to do with climate or sea levels. Neither does the subject of this silly article:
“Since Roman times, silting and land reclamation in the Pevensey Levels have pushed the coastline out by about 1.5 kilometres (0.93 mi), leaving the castle landlocked.”
https://en.wikipedia.org/wiki/Pevensey_Castle
......The shoreline of the old Lake Cahuilla is still visible at the base of the surrounding mountains. It averaged about 40 feet above sea level, but varied from 25 to 50 feet elevation. The variability of elevation is thought to be due to subsidence of the basin floor.
...... Radiocarbon age-dating of charcoal and fish bones found interstratified in the lagoonal silts behind gravel bars suggests that the lake existed since before the year 1200. Further evidence discloses that about 900 years ago, while Lake Cahuilla was a young, vigorous freshwater lake, the Cahuilla Indians, generally thought to be connected to the Aztecs by language, appeared from the northeast.
..... With the first Spanish explorations in the 16th century, they found no lake in the Salton Basin. This suggests that Lake Cahuilla had evaporated completely by 1600, or about 400 years ago. Yet, these early Spanish records allude to Indian legends of the existence of a large body of water to the west. The Indians now living in the Coachella Valley have distinct legends to the effect that at some time in the past the valley was occupied by a large body of water.