following is extract from perurail users agreement...
"18. When operational or technical reasons obligate PERURAIL to relocate the clients onto a different service or train frequency, PERURAIL will try its best to contact the client and make the necessary arrangements wherever and whenever possible. If it is an Act of God, PERURAIL will not be liable but shall try within its limits to make the necessary arrangements.
23. Departure times are subject to change because of weather conditions, technical reasons, route conditions or acts of god. " (bold mine)
I really like that:) It's an act of god! I hope god will be OK with my evt. visit to Machu Pikchu!