The Spanish grid operator has ruled out a cyber attack as the cause of a massive power cut affecting Spain, Portugal, and parts of France. Preliminary findings suggest no interference in control systems, but the exact cause remains unclear. Investigators are looking into multiple failures that may have led to the blackout, which saw a sudden loss of 15GW of power. Experts indicate that mismatches between supply and demand could have triggered cascading effects, leading to the outage. The situation is complicated by the reliance on renewable energy sources, which have their own challenges.