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 government is reportedly working to reestablish electrical service across the country after the national grid collapsed for the second time since midday Friday.

HAVANA (Reuters) - Cuba's national grid collapsed on Friday, leaving the entire population of 10 million people without electricity and underscoring the precarious state of the Communist-run country's infrastructure and economy. Restoration of service is under way but long-term challenges will remain. WHY DID THE GRID COLLAPSE?

The fourth such failure in 48 hours raised fresh doubts about a quick fix on an island already suffering from severe shortages of food, fuel and medicine.

Cuba’s government says some electricity has been restored on the island after one of the country’s major power plants failed and left millions without electricity for two days

Millions of Cubans awoke on Sunday to find their homes still without power after another partial grid failure overnight, deepening a crisis that has raised questions over the viability of the government's efforts to reestablish electrical service.

Cuba's government said on Saturday it had made some progress in gradually re-establishing electrical service across the island, including to hospitals and parts of the capital Havana, after state-run media earlier reported the national grid had collapsed for a second time in 24 hours.

Many Cubans waited in anguish Sunday as electricity on much of the island had yet to be restored days after an island-wide blackout. Their concerns were also raised as Hurricane Oscar made landfall in the southeastern Bahamas and was heading toward their country.

CubaDebate, one of the islands state-run media outlets, said Cuba`s grid operator, UNE, had reported at 6:15AM the "total disconnection of the national electro-energetic system." "The Electric Union is working on its reestablishment,

Cuba's national grid collapsed on Friday, leaving the entire population of 10 million people without electricity and underscoring the precarious state of the Communist-run country's infrastructure and economy.