MADRID (AP) — The cause of Spain and Portugal’s widespread blackouts remained a mystery on Tuesday, with some isolated disruption remaining after power was largely restored to both countries.

The massive power cut that stranded Mr Hughes triggered chaos across Spain and Portugal, and also impacted Andorra and parts of France, from about midday local time (10:00 GMT). Traffic lights shut off. Metros closed. Businesses shuttered and people joined queues to get cash as card payments did not work.

The sweeping power outage that hit Spain and Portugal this week has raised questions about the electricity grid in a region not normally known for blackouts