- Lead. Cuba suffered its fifth nationwide blackout of 2026 on Tuesday, leaving roughly 10 million people without power as the island’s Soviet-era grid buckles under a US oil blockade that has stripped all reserve capacity.
- Fact. The state electricity company UNE is generating only 935 megawatts against a demand of 3,100 megawatts — less than 30 percent of what the island needs — with 106 distributed-generation plants idle for lack of fuel.
- Stake. The cascades are accelerating: the Antonio Guiteras thermoelectric plant, Cuba’s largest, had already broken down 17 times this year before the latest collapse, and each outage now takes more than 24 hours to reverse.
Cuba’s Ministry of Energy and Mines declared a “total disconnection of the electrical system” on Tuesday, the fifth time in 2026 that the national grid has gone dark island-wide. The outage began in the late morning when a fault cascaded across a grid that has been running for months with no meaningful reserve margin, according to Al Jazeera.
A Grid That Has Nowhere to Fall
The underlying arithmetic is unforgiving. Cuba’s ageing infrastructure — much of it commissioned in the 1960s and 1980s with Soviet-bloc components — was never designed to be run at 30 percent of demand with no spinning reserve. When the gap between generation and consumption is that wide, any equipment failure triggers a cascade. The Guiteras plant alone, responsible for a significant share of what little capacity remains, has now failed 17 times this year.
Behind the mechanical failures lies an acute fuel shortage. President Trump signed an oil blockade executive order in January 2026 that halted US-licensed shipments and applied pressure on third-country exporters. Venezuela, which had long subsidised the island with cheap crude, cut supplies after Nicolás Maduro lost power; Mexico followed under US pressure. Cuba currently produces only about 40 percent of its own oil consumption, leaving it exposed to any disruption in what remains of its import channels.
The Human Cost
Previous blackouts this month each took more than 24 hours to restore, during which public transportation halted and tens of thousands of surgeries were cancelled nationwide. Residents in Havana and other cities have taken to banging pots and pans in the dark, chanting “turn on the lights” — an echo of protest traditions from earlier generations of Cuban unrest.
The Cuban government attributes the crisis directly to Washington. The United States attributes it to decades of mismanagement by the ruling party. The reality is that both a chronically under-maintained grid and an externally imposed fuel squeeze are now feeding each other: each blackout causes further damage to equipment that was already failing, and the island lacks the hard currency or the fuel to rebuild.
No Clear Path to Stabilisation
Short of a rapid and substantial injection of fuel — which the current US-Cuba diplomatic posture makes unlikely — engineers have no mechanism to stop the collapses. The island’s 106 offline distributed-generation plants cannot restart without diesel. The main thermoelectric facilities cannot be properly maintained without spare parts that must be procured in hard currency. And the grid cannot absorb a new fault, however small, while running this far below minimum stable generation.
The five nationwide blackouts of 2026 have not yet prompted a shift in Washington’s position. Havana has not signalled a willingness to make the concessions the Trump administration has demanded. The lights, in the meantime, keep going out.