Cuba's power-grid operator said it had restored electricity to parts of the capital Havana on Monday following a fourth major grid failure in 48 hours, while Tropical Storm Oscar lashed the island's eastern end.

Cuba's largest oil supplier, Venezuela, has reduced shipments to the island to an average of 32,600 barrels per day in the first nine months of the year, barely half the 60,000 bpd sent in the same period of 2023, according to vessel-monitoring data and internal shipping documents from Venezuela's state company PDVSA.

Cuba has restored a trickle of power to its grid by mid-evening, officials said, hours after the island plunged into a countrywide blackout following the collapse of one of its major power plants.