Blackout in Spain: A warning for critical infrastructures

In April 2025, Spain suffered a large-scale power outage that paralyzed several regions for hours. According to reports, the cause was a fault in the European high-voltage grid – triggered by a combination of technical and weather-related factors.

Such events make it clear how vulnerable our modern societies are – especially when it comes to critical infrastructure. Energy supply, healthcare, transport and communication are closely interlinked. If one element fails, far-reaching chain reactions can occur.

Many people were surprised by the blackout in everyday situations: they stood at ATMs that suddenly refused to work or at supermarket checkouts that stopped working without power. Passengers waited at airports because check-in systems and electronic displays failed. Video conferences broke down in offices, neither lights nor the internet worked in homes, and even traffic lights failed, bringing traffic to a standstill in many places.

A power outage is more than just a technical problem. Vital equipment can fail in hospitals, communication networks can collapse and transportation and logistics systems can come to a standstill. Especially in the context of increasing networking, digital dependencies and more frequent extreme weather conditions, the risk increases – and with it the need to act with foresight.

At bürgi.com, we deal with the resilience of such systems on a daily basis. We develop solutions that work even during power outages – from intelligent access controls to robust emergency concepts for companies and public authorities.