The collapse follows nationwide blackouts last year that plunged Cuba's frail power-generating system into disarray.

Cuba‘s electric grid collapsed late Friday leading to a nationwide power outage and leaving millions in the dark. At around 8:15 p.m., an outage at the Diezmero substation in Havana caused “a significant loss of generation in western Cuba and,

Cuba’s power grid collapsed Friday night, triggering a nationwide power outage and plunging more than 10 million people into darkness.