. >> julie londo has lived here since the mid 1980s, and seen the area around her decline. >> you canee the water used to come all the way up to the rocks there. >> all the way up to there? >> yes. >> how long ago was that? >> 10 years ago. >> wow. >> you can see the little dead fish. >> oh yes. >> they're all over the sea. there are some fresh ones. >> oh wow. >> as the lake levels have dropped, it's become increasingly tainted, collecting waste and chemical runoff from farms. >> so this entire sea is essentially from colorado river water, but now it's so salty that it's killing the fish in the water and washing up on the shore, and you can see them every few feet just literally lying along the sea line. with no new water coming in, the salton sea is slowly drying. the impacts becoming increasingly apparent as we traveled further east down the coast. the lakebed is now poisoned with selenium and arsenic, chemicals found in fertilizer and pesticide. dead fish wash up on these beaches every day. sometimes thousands at a time. it's a reminder of what's at stake when water becomes scarce