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.

Vast areas of Spain and Portugal have been hit by a serious power outage, causing transport services to grind to a halt. Authorities are working to evacuate parts of the Madrid underground, with large traffic jams reported in the city centre after traffic lights stopped working. Blackouts have been reported from Madrid to Lisbon.