Cuba had four electric grid collapses since Friday, and most of the country remains in the dark as slow progress is made to restore power.

Cuba's efforts to restore power to the island were derailed for a third time late on Saturday, Cuban authorities said shortly before midnight, leaving millions in the dark and raising fresh questions over the viability of the government's bid to reestablish electrical service.

Hurricane Oscar made landfall in Cuba, where residents were preparing for more chaos and misery as the country grapples with a nearly nationwide power outage in its third day.