Maybe or maybe not in line with our recent note about the European heat wave:
The Japan Times: "Local media in Switzerland pointed to the possibility that the rails
might have been distorted by a sudden temperature change, saying the
weather cooled down abruptly during the past several days following a
hot spell. The Tribune de Geneve said in its online edition that a
number of passengers rushed to one side of the train trying to take
landscape pictures just prior to the derailment."
Whatever it was, that's awful. And we're watching because we'll be on that train in a few weeks.