Trains will be running at slower speeds on the Seymour and Shepparton lines on Monday, with temperatures set to soar into the mid-30s.
V/Line said a full extreme heat timetable would be in place on the two lines, which stop at Donnybrook station.
A copy of the extreme heat timetable can be downloaded from the V/Line website or passengers can ask for a copy from their nearest staffed station.
Extreme heat timetables are implemented when temperatures exceed 36 degrees in order to reduce the likelihood of train and track faults, while also keeping passengers safe.
During extreme heat trains run at slower than normal speeds and may depart and arrive at different times, passengers are encouraged to allow extra time for their journeys.
There will be drinking water on board trains and passengers are also encouraged to travel with bottled water and wear cool clothing.
Details: vline.com.au
