Many Cubans waited in anguish late Sunday as electricity on much of the island had yet to be restored days after an island-wide blackout. Their concerns were heightened as Hurricane Oscar slammed into Cuba’s eastern coast,

Cuba’s electrical grid shut down on Friday, putting the country into a blackout after the failure of one of the island’s major power plants, according to its energy ministry.

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.