The Connex spokeswoman said trains were not running between Flinders Street and Elsternwick stations.

Passengers requiring stations before Elsternwick were advised to catch a route 67 tram from Swanston Street, she said.

Those wishing to travel further on the Sandringham line could catch Pakenham, Frankston or Cranbourne trains to Caulfield where buses will take passengers to Elsternwick.



The Connex spokeswoman said railway track metal expanding in the heat had caused some cancellations, with broken air conditioning units also hitting services as trains would not run if the cooling wasn't working.

Morning commuters were warned to check again tomorrow for cancellations as Melbourne braces for an uncomfortable night with a maximum of 39 degrees tomorrow before a cool change in the afternoon.