Cuba's Nationwide Blackout: Why the Grid Failed Again
Cuba's entire electricity grid shut down on Friday, leaving millions across the island without power.
The outage started just before 2 p.m. local time (18:00 GMT), according to grid operator UNE. Cuba's energy ministry confirmed it was a nationwide outage. BBC
UNE blamed the failure on a transmission fault combined with poor weather in central Cuba. A transmission fault is a failure in the high-voltage lines that carry electricity from power plants to cities, much like a blocked highway stops traffic. No further technical detail was given at first.
By late Friday evening, UNE said limited power had returned to priority circuits, including areas near hospitals and water pumping stations in Havana. The failure had affected the whole island, and officials said restoration would be gradual.
Felix Estrada, UNE's national load dispatch director, said protocols for gradual restoration were activated and work was continuing on Saturday. Load dispatch is the team that balances electricity supply and demand. As of September 19, restoration was still underway.
Friday's event was at least the sixth partial or total blackout in Cuba this year, and the pace has quickened. By July 7, Cuba had already recorded its third nationwide blackout of the year.
The pattern continued through the summer. In August, the national grid collapsed again on a Monday while authorities were still working to restore power after a nationwide blackout late Sunday. Reuters
Cuba has about 11 million people. In March, a separate collapse left around 10 million without power. Reuters ABC News and DW also reported the latest collapse as leaving millions across the island without electricity.
Cuba depends heavily on imported fuel. U.S. sanctions and an oil blockade since the start of the year worsened existing fuel shortages. Sanctions are government penalties that restrict trade and finance.
Venezuela was believed to have sent around 35,000 barrels of oil per day, about half of Cuba's needs, until supplies were cut off after the U.S. seizure of President Nicolas Maduro in January. U.S. President Donald Trump threatened tariffs on countries shipping oil to Havana.
The broader context here is a power system with little room to absorb shocks. When fuel is scarce and plants sit idle or run only at times, operators face hard choices about supply and reserves. A transmission fault that might otherwise stay local can then force a wider shutdown.
Looking at what this means for Havana, the test is both operational and political. Restoring hospitals and water systems first is standard practice. Keeping that recovery going while communicating clearly through repeated island-wide outages is harder.
In my view, the questions to track now are about duration and repetition. How fast full service returns this time, which regions lag behind, and whether the stated cause in central Cuba points to repair needs that fuel supply alone will not fix. The gap between events matters as much as any single collapse, because it shapes maintenance, fuel purchases and backup planning.
