Cuba's power-grid operator said it had restored electricity to most of the capital Havana on Monday even as Tropical Storm Oscar lashed the island's eastern end, downing trees and power lines.

Cubans experienced their second black out wave Saturday after government officials said they were working to restore electrical service to hospitals and crucial service centers after a grid failure on Friday.

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.

Cars drive on Havana's seafront boulevard Malecon as the country's electrical grid collapsed again on Sunday, according to Cuba's energy and mines ministry, in the latest setback to the government's efforts to restore power to the island,

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.

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.

The repeated failure of the power grid and a hurricane that has swamped the island’s eastern end has many Cubans fed up, posing a challenge to the Communist government.