There are disruptions on the Lilydale line, in Melbourne's eastern suburbs, after a train derailed yesterday.
Train operator Metro says it is believed the track warped in the heat, causing the train to derail.
The passengers were all safely removed from the train.
Buses are replacing trains until further notice between Lilydale and Ringwood.
Track repairs are underway.
© ABC 2013
14:24 EDT Thunderstorms are due to develop daily across New South Wales and Queensland for almost two weeks.