Trains coming into the capital from the Namur, Liege and Charleroi areas are to be the most affected.
A fire was identified at around 6:30 in a lodge by the rail tracks, leading a train carrying a dozen passengers to be safely evacuated.
The fire brought most rail traffic in capital to come to a complete standstill for nearly an hour and a half, and services started operating again at around 8:00 AM.
The incident, which led to important delays and some cancellations, reportedly originated after the flames from a fire lit by a homeless person who lived near the lodge propagated through the cables and reached the junction box.
The Brussels Times
This article has been updated to include the most recent developments.