Power began to go out in buildings in Havana around 6:30 p.m. local time on Saturday, just before darkness fell across the country. Work is underway to fix the problem.
US sanctions and a blockade of oil from Venezuela have deepened authoritarian Cuba's energy and economic crisis.
President Miguel Díaz-Canel stated a little over a week ago that the island nation had not received any oil deliveries for over three months.
On Saturday, aid shipments from 120 organizations began arriving in Cuba.
What do you think?