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.

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 entered a third day without electricity after another outage Saturday evening set back efforts to restore power on the island, underscoring the challenges posed by decades-old, poorly maintained infrastructure.