When I was traveling to Kansas City in the morning 6/28/2012 when we passed Junction City, KS we saw Hazmat crews, cranes and burning coal cars. In the back of my mind I wondered what happen so now I am back to search for an answer. I came across an article in SkyTruth about the heat causing the train derailments by creating  ‘sun kinks’. They listed three others in the last two weeks. All in areas where we have been having heat waves. So now i still ponder………..