Cuba's national electrical grid collapsed for the second time in a week on Saturday, March 22, leaving more than 10 million people — the island's entire population — without power to their homes and businesses. It was the third major blackout in March 2026. Cuba's energy ministry confirmed "a total disconnection of the National Electrical System." Grid operator UNE said it was prioritizing restoration to hospitals and water systems first.
The cause, as stated by Cuban officials and reported by the BBC, is straightforward: a US fuel blockade has cut off the foreign oil imports Cuba needs to run its power stations.
How Cuba's Grid Got Here
Cuba's electrical infrastructure is aging and has been underfunded for decades. The island relies heavily on oil-fired thermoelectric power plants — plants that burn fuel oil to generate electricity. When fuel runs short, the plants go offline. When enough plants go offline simultaneously, the grid collapses.
For most of the past two decades, Cuba's primary oil supplier was Venezuela under Presidents Hugo Chávez and then Nicolás Maduro. Venezuela supplied Cuba with subsidized oil — sometimes as many as 100,000 barrels per day — in exchange for Cuban medical workers and security personnel. That arrangement made Cuba structurally dependent on Venezuelan oil, with minimal alternative supply chains.
That supply chain broke on January 3, 2026, when US soldiers seized Maduro. With Venezuela's government in crisis, the subsidized oil shipments stopped. Cuba had no comparable fallback supplier. The US simultaneously imposed a fuel blockade — cutting off Cuba's access to foreign oil imports — which the BBC describes as intensifying the existing shortage.
The result: power stations running on empty, load shedding escalating to full grid collapse, and by March, the island experiencing total blackouts multiple times in a single month.
Public Dissent and Its Limits
The blackouts have produced something rare in Cuba: public protests. When the most recent full-grid collapse occurred earlier in the month, residents in central Havana responded by banging pots and pans — a form of protest with Latin American historical roots, used as a signal of discontent with governments. In the central Cuban town of Morón, protesters went further: they attacked and set fire to the Communist Party headquarters.
Unauthorized demonstrations are illegal in Cuba, and those who participate risk imprisonment. The fact that protests occurred at all — and reached the level of attacking a Party building — reflects the severity of daily life under the current conditions.
A coalition of international socialist organizations arrived in Havana over the weekend with aid: solar panels, basic food kits, and medicines. A separate aid flotilla — the "Nuestra America" convoy departing Mexico — was delayed by rough seas and is expected to arrive Monday.
The Trump Position: "Friendly Takeover"
The political context around the fuel blockade matters. The blockade is not the 62-year-old US trade embargo, which has been a feature of US-Cuba policy since 1962 — it is a more acute, targeted restriction on fuel imports specifically. The Trump administration has linked lifting it to regime change.
President Trump is reported to want the removal of Cuban President Miguel Díaz-Canel as a condition for lifting the fuel embargo. Díaz-Canel is a close regional ally of Venezuela — which, with Maduro now in US custody, is in political transition. Last week, Trump suggested there could be a "friendly takeover" of Cuba, later saying it would be an "honor."
Cuba's government has responded to both the humanitarian pressure and the political threat on separate tracks. On the humanitarian side, Díaz-Canel said this weekend that Cuba has "a preparation plan to raise our people's readiness for defence" against any US military aggression. On the diplomatic track, the American and Cuban governments have held initial phases of bilateral talks aimed at ending the crisis — though Díaz-Canel confirmed their existence without characterizing their progress, and the deputy foreign minister made clear the political system is not a negotiating item.
Historical Context: Energy as Leverage
Using fuel supply as political leverage against Cuba is not new in the historical record — but the current application has distinct characteristics.
The original US embargo, imposed in 1962 following Cuba's nationalization of US-owned assets and its alignment with the Soviet Union, was comprehensive from the start. The Soviet Union stepped in as Cuba's primary economic patron, including oil supply, for three decades. When the Soviet Union collapsed in 1991, Cuba entered what it calls the "Special Period" — a severe economic contraction defined by fuel shortages, food rationing, and mass emigration. GDP contracted by an estimated 35% between 1989 and 1993. Blackouts lasting 16 hours per day were common. Cuba survived that period through a combination of economic adaptation, agricultural reform, and eventual Venezuelan oil support under Chávez starting in 1999.
The pattern is consistent: Cuba's energy situation tracks its geopolitical alignment. Soviet oil ended with the USSR. Venezuelan oil began with Chávez. Both supply chains had political strings attached. The current crisis follows the same structure — the difference is that this time, the disruption is happening simultaneously with a global oil supply shock from the Iran war, which is raising energy prices for everyone while Cuba can access almost none of it.
The Iran War Connection
Cuba's blackouts are one of the less-covered downstream effects of the Iran war's global energy disruption. The Strait of Hormuz closure has cut roughly 20% of global oil supply from international markets. That supply shock has driven up prices for every barrel that is available. For countries with money and established supply chains — like most of Europe and the US — the shock is expensive. For Cuba, which has neither money nor access to fuel markets under the blockade, the global tightening is an additional constriction on an already sealed system.
Cuba cannot benefit from oil price arbitrage, alternative suppliers, or strategic reserve releases. Its grid was already failing before the Iran war. The war has simply made the surrounding global conditions worse.
What Comes Next
Cuba's grid operator UNE is restoring power incrementally, prioritizing vital infrastructure. The "Nuestra America" aid flotilla arrives in Havana on Monday. Bilateral US-Cuba talks are ongoing but opaque. Trump has made regime change a precondition for lifting the blockade; Cuba's government has publicly refused that precondition. No resolution is in sight.
The island's 10 million people are now in their third full blackout in a month, in a grid with no buffer, no alternative fuel supply, and no near-term diplomatic path to relief.
The aid flotilla arrives Monday. The US-Cuba talks continue with no timeline.