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 has repeatedly failed to bring its electrical grid back up as a result of fuel shortages and deteriorating infrastructure, threatening a social explosion.

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. Strong winds raked the region as the storm stalled over land,