I just found some photos from the train tracks to Machu Picchu. In many areas the track is simply gone or dangling over river. It's going to be several months (at least) before there is access to Machu Picchu again.
http://www.livinginperu.com/news/11314 It's such a sad situation there. I'm glad all of the LCTers and other Regent travelers got out safely!