Trains, traffic lights, card payments, and phone networks have been hit, as an EU official also rules out a cyber attack as the cause.

A massive blackout paralyzed Spain and Portugal on Monday in an incident with no immediate explanation. “Causes are being analyzed, and all resources are being dedicated to addressing the issue,” Spain’s national grid operator, Red Eléctrica, said in a statement.

Portuguese resident Madalena Malveiro tells CNN’s Becky Anderson what it is like on ground in Lisbon as the entire Iberian peninsula experiences a power cut.