Red Electrica, Spain's power operator, says that as of 06:00 local time (05:00 BST), 99.16% of power has been restored to mainland Spain. "All substations on the transmission grid are operational. We continue with the restoration work," the operator says.

Officials race to find cause of blackout as electricity returns to homes - More than 90% of power restored in Spain and Portugal as authorities try to find the cause of outage