By 11 p.m. ET, Oscar's maximum sustained winds decreased from 75 mph to 70 mph. Cuba's electrical grid collapsed on Sunday for the fourth time in 48 hours, marking a major setback in the government's efforts to quickly restore power to exhausted residents already suffering from severe shortages of food,

Oscar, which the National Hurricane Center characterized as "very small," is the 15th named storm of the hurricane season.

The center in Miami said the storm’s center arrived in the Cuban province of Guantanamo, near the city of Baracoa, on Sunday evening. Its maximum sustained winds were near 80 mph.