Millions of Cubans remained without power for a third day in a row Sunday after fresh attempts to restore electricity failed overnight and the power grid collapsed for the fourth time – all before the arrival of Hurricane Oscar.

Cuba's electrical grid collapsed again on Sunday, the fourth such failure in 48 hours, with a hurricane making landfall to compound the island's misery and threaten further havoc on its decrepit infrastructure.

Cuba's power grid has ground to a halt for a second time in as many days, leaving 10 million on the island without power and the Caribbean island in a growing sense of crisis.