Cuba's power grid collapses again after nationwide blackout

Cuba's national electrical grid has collapsed once again, plunging the island into a devastating nationwide blackout that highlights the extreme fragility of the country's energy infrastructure. According to reporting detailed by Al Jazeera, the power went out across the entire island late Sunday night. Although state authorities slowly began bringing service back online on Monday, much of the country remained entirely disconnected after the network suffered a secondary collapse hours later.

The fresh setback struck just as state utility Union Electrica de Cuba (UNE) and workers were attempting to reconnect units at the Energas gas-fired plant located at Boca de Jaruco, east of Havana. While a small percentage of the capital had seen power temporarily restored by Monday morning, that progress was completely wiped out when the grid failed again. According to The Detroit News, state television journalist Lazaro Manuel Alonso reported that a new disconnection of the National Electric System (SEN) occurred on Monday afternoon despite earlier restoration milestones.

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State officials offered differing explanations for the sudden failure during the recovery phase. Alonso stated via social media that an electric oscillation triggered the collapse. Meanwhile, UNE issued a separate official statement carried by state media reporting that adverse weather conditions affected the transmission network during restoration efforts, directly impacting generating units that had already returned to service. By early evening on Monday, authorities noted that four generating units at Energas Jaruco were operating and several transmission substations around Havana had been re-energized.

The latest crisis follows a turbulent period for the Caribbean island's power sector. The network previously suffered three nationwide grid failures over a nine-day period, including two island-wide failures in the same week. Those summer blackouts left roughly 10 million people without electricity as authorities struggled to generate enough power to meet baseline demand. Most residents across the nation now receive only a few hours of electricity a day at best.

The chronic instability stems from a combination of outdated infrastructure, fuel scarcity, and severe economic constraints. Cuba's thermal generating fleet relies heavily on facilities that are more than 30 years old and have received limited maintenance due to shortages of spare parts and financing. Before Sunday's total failure, Havana’s electricity company had already recorded numerous unresolved local complaints regarding damaged transformers, circuit failures, and planned cuts linked to insufficient generating capacity across municipalities such as Guanabacoa, Habana del Este, La Lisa, and Marianao, as noted by Al Jazeera.

Extended outages have heavily disrupted daily life, crippling transport, water supplies, communications, and medical services. Households are left struggling to preserve food, cook meals, or sleep amid intense summer heat. When total blackouts occur, authorities typically attempt recovery by creating small, isolated power networks to supply critical infrastructure like hospitals, water systems, and food facilities before gradually reconnecting larger generating plants.

The electricity crisis has also taken on a sharp diplomatic dimension, with stark disagreements over the root causes of the blackouts. The Cuban government blames long-standing United States sanctions and trade restrictions, pointing specifically to Washington's severe restrictions on oil supplies, financing, and equipment. According to Al Jazeera, Cuba lost a crucial fuel source after United States President Donald Trump imposed an oil blockade following the January 3 abduction of Venezuelan President Nicolas Maduro. Venezuela had historically served as Cuba's primary oil supplier, and subsequent fuel imports from Mexico have also reportedly halted amid mounting pressure from Washington. Conversely, Washington argues that the ongoing outages reflect systemic failures within the country's state-run economic model, while independent analysts frequently cite decades of chronic underinvestment and domestic mismanagement in the energy sector.

Recent Timeline of Cuba's Energy Crises

• January 3: The United States abducts Venezuelan President Nicolas Maduro, followed by a U.S. Oil blockade that cuts off Cuba's primary fuel supply.
• July: Cuba's national grid collapses three times within a nine-day span, including two island-wide failures in a single week affecting roughly 10 million people.
• Sunday, late: The power grid suffers another nationwide collapse just before 11 p.m. (0300 GMT on Monday), leaving the island dark.
• Monday: UNE attempts restoration, bringing units at the Energas Jaruco plant online, but an electric oscillation and adverse weather conditions trigger a secondary grid collapse during the afternoon.

As the government works to stabilize the system once again, the broader Al Jazeera and Detroit News reporting underscores how fuel scarcity and aging machinery continue to threaten basic public services across the nation.