An international aid flotilla arrived in Havana harbour on Monday carrying fuel, medicine and food supplies for an island that has been brought to its knees by the Trump administration's oil blockade. It was a scene that belongs to a different era — foreign ships running a de facto American blockade of a Caribbean nation — but in March 2026, it is the reality of US-Cuba relations.

Cuba's national power grid has collapsed three times this month. On March 4, a shutdown of the Antonio Guiteras Power Plant left millions in western Cuba without electricity. On March 16, the entire national grid failed, plunging 11 million people into darkness. A partial restoration was followed by yet another collapse last week. The pattern is now familiar: the grid staggers back to life, operates at a fraction of capacity for a few days, and collapses again because there is not enough fuel to keep the generators running.

The Blockade

The United States began intercepting oil tankers bound for Cuba in February 2026, targeting shipments from Mexico's state-owned Pemex and threatening countries that continued supplying the island with tariffs. The blockade is not formally declared — Washington calls it "enhanced enforcement of existing sanctions" — but the effect is identical. Cuba's fuel imports have fallen by an estimated 80% since January, and the country's ageing power infrastructure cannot function without them.

The blockade is part of what the Trump administration calls its "maximum pressure" strategy toward Cuba, which began with tightened sanctions in early 2025 and has escalated steadily. In January 2026, Trump told Cuba to "make a deal before it's too late." In March, he said he would have "the honour of taking Cuba," adding: "I mean, whether I free it, take it. I think I could do anything I want with it."

The Humanitarian Cost

The lack of fuel has cascaded through every aspect of Cuban life. Without electricity, water pumping stations fail. Without water, sanitation collapses. Without refrigeration, food spoils. Hospitals are operating on emergency generators when they have diesel, and without power when they do not. Public transport has effectively ceased in most of the country.

On March 13, President Miguel Díaz-Canel confirmed for the first time that Cuba had entered diplomatic talks with the United States aimed at easing the blockade. The acknowledgement was itself remarkable — Havana had spent weeks insisting it would not negotiate under pressure — and suggests the humanitarian situation has become untenable.

The International Response

The aid flotilla that arrived Monday was organised by a coalition of Latin American governments, NGOs and church groups. Mexico, which has been the most vocal critic of the blockade, contributed the largest share of supplies. The flotilla's arrival was broadcast live on Cuban state television, presented as evidence of international solidarity against American aggression.

The broader international response has been muted. The UN General Assembly has condemned the US embargo on Cuba annually for three decades, and this year's resolution passed with the usual overwhelming majority. But resolutions do not generate electricity, and the countries with the economic leverage to pressure Washington — the EU, Japan, Canada — have been reluctant to pick a fight with Trump while the Iran war dominates their foreign policy bandwidth.

Cuba has survived American sanctions for sixty years. But sanctions and a naval blockade are different things, and a country that cannot keep its lights on for more than a few days at a time is a country in genuine crisis. The aid flotilla bought Havana a few weeks. It did not change the fundamental equation: as long as the blockade continues, Cuba's grid will keep collapsing, and 11 million people will keep living in the dark.