Cuba was plunged into its third nationwide power blackout since the beginning of the year on Monday, exacerbating an already severe energy crisis fueled by diminishing fuel reserves and the impact of the U.S. blockade.

The country of nearly 10 million people experienced the widespread outage, the cause of which is currently under investigation, according to the state-run Electric Union. This incident marks the latest in a series of disruptions to the island's already strained power grid.

Energy and Mines Minister Vicente de la O Levy stated that protocols were swiftly implemented to restore electricity across Cuba. He noted that vital services, such as hospitals and food production facilities, were being protected despite the complex situation, which he attributed to the "energy blockade" faced by the nation. By late afternoon, however, the grid operator UNE reported that it could only supply one percent of Havana's electricity demand.

The blackout highlights the severe implications of Cuba's energy challenges, which have been significantly worsened by U.S. policies. President Donald Trump's administration cut off oil deliveries from Venezuela in January and has threatened tariffs on countries supplying oil to Cuba, deepening the island's financial crisis and accelerating the frequency of blackouts.

This latest nationwide blackout is the eighth such event on the island since late 2024. The government has been implementing rolling power cuts, some lasting over 30 hours in Havana and more than 70 hours in rural areas, in an effort to conserve fuel. These measures have led to widespread public frustration, with residents describing the situation as "agony."

Cuban President Miguel Díaz-Canel accused the United States of attempting to incite social unrest by restricting Cuba's fuel supply. He praised the efforts of electrical workers as "heroic" in the face of what he termed a "genocidal energy blockade."

Since January, the U.S. sanctions have severely limited oil imports to Cuba, allowing only one tanker, from Russia, to dock on the island. This stringent policy is part of a broader sanctions campaign aimed at ending Cuba's communist government.

The recurring blackouts underscore the fragility of Cuba's infrastructure and its vulnerability to external economic pressures, raising questions about the long-term stability of its power supply and the effectiveness of U.S. sanctions in achieving their stated objectives.