Melbourne Central railway station has reopened after it was shut down during peak hour this morning after it was flooded overnight.
The station's four platforms were inundated.
Commuters were forced to get off at stations either side of the city loop station.
Passengers were not the only ones affected, shop owners inside the shopping precinct missed out on the morning rush.
Metro Trains Daniel Hoare, says he is confident the source of the leak will soon be found.
"Once the water is turned off, we can then move to look at some of the harder to reach places, it might be within one of the retail precinct," he said.
"It might be within one of the shops up there, for example, we can then get in and find out exactly where those pipes are."
© ABC 2013
12:32 EST Today is the start of a very chilly week for Melbourne.