Electricity service in Cuba is gradually being restored more than 36 hours after a substation failure left the entire island in the dark.

A widespread blackout left millions of Cubans without electricity for a second consecutive night Saturday, marking the island's fourth major outage

Cuba experienced a massive power outage affecting 10 million people after an antiquated grid component failed. The government is working to restore power, but the crisis highlights longstanding infrastructure issues exacerbated by economic challenges and U.