The BNSF train hit a thirty ton boulder on the tracks and derailed into the water. In the video you can see the engineer climbing out of the lead locomotive which is in the water. There is also a diesel spill but I couldn't get the right diesel-in-the-water tone. Everyone was ok but the locomotive that is half derailed had a traction motor in the water.
https://www.youtube.com/watch?v=wiREoxHbzkQ&t=40s
