As the Salton Sea recedes and evaporates, toxic residue from agricultural runoff is exposed. Winds then whip up the pollutants, causing a public health threat.
The Salton Sea, a vast expanse of saltwater in the desert northeast of San Diego, was created by an epic flood in 1905. Today it's in trouble, a victim of Southern California's endless quest for water. Recent deals to transfer water to thirsty cities in the Southland could be the demise of the Salton Sea, and a threat to the health of those who live nearby. Reporter: Sam Harnett