A massive power outage appears to be affecting large portions of Spain and Portugal Monday. Red Electrica, the operator of Spain's power grid, said early Monday morning it had begun its plan to restore electricity and that the cause of the outage was being analyzed.

Traffic lights are seen without power in Madrid as a massive power outage is affecting Spain and Portugal. (Credit: Reuters)

Several airports, including Madrid airport, which is Spain's busiest, had no electricity, El Mundo reported. Major cities including Barcelona, Seville and Valencia were without power. Parts of France were also affected by power loss.