A SEVEN-DAY heatwave in the Mallee has forced passenger trains off the tracks.

The Department of Transport said on Monday an extreme heat timetable would be in place on the Bendigo and Swan Hill V/Line services on some of the days this week, as temperatures hit the 30s.

Passengers were urged to check the V/Line website and view a copy of the extreme heat timetable or ask for a copy from their ne...