Spain’s nationwide blackout this week has put a spotlight on potential vulnerabilities in its system that may offer warnings to other countries, as rising electrification and clean energy sources place new demands on power grids around the world.

Spain's government said it had asked private energy companies for "maximum collaboration and transparency" to help identify the cause of the outage.

Spain's grid operator rules out the possibility of a cyberattack and attributes the power outage to a drop in solar energy production – “This must never happen again,” says Sánchez – He promises impro