Fans roared in excitement and organizers sighed with relief as the Tomorrowland music festival kicked off Friday — just two days after a massive fire engulfed the main stage and threw one of Europe's biggest summer concert events into doubt.

Video showed thick plumes of black smoke rising from the famed festival grounds in Boom, Belgium on Wednesday. Fireworks could also be seen and heard going off in the distance.

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.