Spain Outage Was First of Its Kind, Worst in Decades, Group Says

The blackout that left Spain without power last April was the most severe incident to hit European networks in two decades and the first of its kind, according to the European Network of Transmission System Operators for Electricity. Damian Cortinas, the organization’s chairman, said the April 28 outage was Europe’s first blackout linked to cascading voltages. More than 50 million people lost electricity for several hours.

A preliminary report published in July attributed…