A huge fire on Wednesday at Belgium's Tomorrowland music festival site has “severely damaged” the main stage two days before the event was due to start, organizers said.

Tens of thousands of campers have arrived at Tomorrowland in Belgium, a day after a fire destroyed the festival's main stage.

"I am confident that Tomorrowland will balance creativity and the safety of festival-goers and staff despite this terrible setback," she said in a statement, according to Belga.