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Millions of people in Cuba were left without electricity for two days after the nation's energy grid went down when of the island's major power plants failed. The widespread blackout that swept across the county was the worst in years.
Authorities were able to restore power to some people by Saturday, but it was unclear when the power would be fully restored across the country.
Here are a few things to know:
What happened and why?
About half of Cuba was plunged into darkness on Thursday evening, followed by the entire island on Friday morning after the failure of the Antonio Guiteras thermoelectric plant in Matanzas Province east of Havana.
Even in a country that for decades has been accustomed to frequent outages amid a series of economic crises, the grid failure was unprecedented in modern times, aside from incidents involving powerful hurricanes, such as one in 2022.
Even as Cuba worked to fix the power problems Saturday, the country issued hurricane watches for the far eastern Guantanamo, Holguin and Las Tunas provinces as a tropical storm developed into Hurricane Oscar, the 10th hurricane of the 2024 Atlantic hurricane season.
Authorities said the outage that began Thursday stemmed from increased demand from small- and medium-sized companies and residences’ air conditioners — as many as 100,000 additional ones this year alone. They also blamed breakdowns in old thermoelectric plants that haven’t been properly maintained because of a lack of hard currency due to U.S. sanctions, as well as insufficient fuel to operate some facilities.
Has this happened before?
While some homes have spent up to eight hours a day this year without electricity as the grid has grown more unstable, the current power failure is considered Cuba’s worst in years.
Officials said that 1.64 gigawatts went offline during peak hours, about half the total demand at the time. The government implemented emergency measures to slash demand, suspended classes, and shut down some state-owned workplaces and canceled non-essential services.
Another major collapse occurred two years ago after Hurricane Ian, an intense Category 3 storm, damaged power installations and the government took days to fix them.
Any political consequences?
It's unknown how Cubans will react if the current blackout endures or recurs.
But problems in the electrical grid have helped sparked street protests several times in recent years, including large demonstrations in July 2021 that led to international criticism of the government for its harsh response. There were also smaller demonstrations due to blackouts in October 2022 and March of this year.
Authorities now say changes to electricity rates for small- and medium-sized companies, which have proliferated since they were first authorized by the communist government in 2021, are being considered.
What's next?
Officials said the state-owned power company UNE was using distributed generation to provide power to some areas of the island and that a gas-fired thermoelectric plant was starting operations.
Cuba gets its power from huge thermoelectric plants like Antonio Guiteras and some smaller ones, which require crude oil to operate. The country produces about half of the crude needed, but must purchase some of the rest on the international market, which can be difficult and costly due to U.S. sanctions. It has also depended on allies like Venezuela and Russia for cheaper fuel.
Authorities have been working since last year on a project to upgrade the island’s electrical grid through the use of alternative power sources. A project to build 31 centers generating solar energy is under way and projected to be completed next year.
“We are devoting absolute priority to addressing and solving this highly sensitive energy contingency,” Cuba’s President Miguel Díaz-Canel wrote on X. “There will be no rest until its restoration.”
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