On Saturday, 24 July 2021, due to a major incident originated in France, France and Spain were disconnected at 16:36 CEST and were brought back into normal operation by the responsible TSOs of Spain and France at 17:09 CEST.

Investigation and verification are currently ongoing on whether the forest fire along the line route was the root cause of the event.

During the disturbance, the frequency deviation of the large part of the Continental Europe was kept within a narrow margin between 49.96 and 50.07 Hz, whereas in the Iberian Peninsula the deviation was more substantial and involved further emergency measures according to the predefined plans. The load and customers which were disconnected in the Iberian Peninsula after 16:36 CEST, were again connected and re-supplied after 17:09 CEST.