Cuba's national power grid suffered a total collapse late Sunday, another in a series of severe energy shortages over the past month, state-owned utility Union Electrica stated on social media platform X.
"At 22:43, a total disconnection of the National Electric Power System occurs. We will continue reporting," it said.
The blackout is the first major nationwide outage of August and follows three similar systemwide collapses experienced throughout July.
Pressure on the power grid has intensified severely as the country struggles to secure fuel imports.
The island has faced acute petroleum shortages following tighter US sanctions and an oil blockade that cut off traditional supply lines from Venezuela and Mexico.
While authorities have begun implementing cautious economic reforms including authorizing foreign-backed fuel import ventures and allowing local businesses to participate in wholesale fuel distribution engineers and state operators continue scrambling to restart grid units and restore power to the island.