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

Millions of people in Cuba are without power after a failure of the nation’s electric grid left the island in the dark

Cuba suffered a massive power outage Friday night affecting Havana and the country's provinces that left millions in the dark. Cuba's Ministry of Energy and Mines said at around 8:15 p.m. local time an outage at the Diezmero substation on the outskirts of Havana had caused "a significant loss of generation in western Cuba and,