Three channels, one island
Washington imposed an oil embargo on Cuba on 29 January 2026. Al Jazeera reports that since then blackouts have exceeded 20 hours a day, working days have been shortened, industrial production has stopped, and shortages of water and medicine have deepened. The same report records the withdrawal of Visa, Mastercard, the Meliá hotel group, Air Canada and Air France.[1]
That list covers three separate links rather than a single sanctions line item. Oil is the input to production. The card networks are the crossing point for the hard currency that comes from tourism and remittances. Airlines and hotel capacity carry the passengers who bring that currency in. When all three close at once, the island can no longer earn from one what it needs to substitute for another.[1]
Where substitution fails
In a country with a land border, a restricted good detours through a neighbour; cost rises and the flow continues. On an island that detour runs through sea and air transport, and both require an insurer, a card network and a scheduled service. What makes the embargo effective, then, is the joint control of finance, insurance and the physical route, rather than the prohibition of a good. The counter-reading cannot be waved away: Cuba's electricity infrastructure was already failing before the embargo, and the available sources do not separate how much of the outage time comes from ageing plants and how much from the absence of fuel.[1]
The one measurable quantity for now is daily outage time. If Cuba announces a new fuel supply agreement or a card network restores service, that time should fall below 20 hours a day before the end of December; if it declines durably while none of the three links reopens, the main driver of the outages is not fuel. President Miguel Díaz-Canel's accusation in Pinar del Río that the United States is pursuing a policy of genocide does not change this mechanism; it registers a political position.[1]