Beginning in the 2020s las Vegas and California experienced a devastating drought which led to the implementation of water desalination technology in order to provide freshwater for this region because of of drought and wildfires. By 2045 California has become a desert once again and many of the cities we’re completely abandoned. By 2089 a series of a series of biomes were built to re-create the California climate that once provide food for North America. These two changes save Las Vegas distraction. From 2100 to 2200 biodome or built all across Las Vegas and some of the casinos were completely covered by the structures. The city of Las Vegas became what independent republic 2125 as a result of the collapse of the US government because of environmental catastrophes. By the 23rd century las Vegas was the most prosperous region in North America second only to the republic of the great lakes.