So it turns out that the Salton Sea was an accident,a man made accident in 1905 stemming from a canal that diverted water from the Colorado River to the agricultural area of the Imperial Valley.
By the seventies,salt heavy soil from the desert(a prehistoric ocean leftover)began infiltrating the Salton Sea.
Add some industrial waste and some toxic run-off from Mexicali and pesticides from the Imperial Valley agriculture fields,and the salinity of the sea began to rise.
Add it all up and it was a poisonous brew,resulting in the death of millions of birds and fish.
The sea became nearly 30% saltier than the ocean,it rose,and pretty much swallowed up homes and businesses along it's shores.