Cuba is facing a severe crisis as a US oil blockade deepens its economic troubles. The 67-year-old communist government is at its weakest after years of economic slump and mass migration. The US, aiming for regime change, has cut oil supplies following an executive order by Donald Trump. This has caused fuel shortages affecting electricity, water, and food transport. Diplomats from US-allied countries in Havana express frustration with Washington’s lack of clear plans beyond the blockade. They fear the blockade could cause extreme suffering, especially in cities, within weeks. The UN's World Food Programme says fuel shortages hinder its efforts to provide relief after last year’s Hurricane Melissa. Even Mexico, Cuba’s largest oil supplier last year, stopped sending oil tankers citing US pressure, though it has sent 800 tons of aid. US charge d’affaires Mike Hammer has acknowledged a "real blockade" at a recent US residence event in Havana. The crisis escalates as airlines from Canada and Russia suspend flights to Cuba due to lack of aviation fuel, forcing mass traveler repatriations. Canada is Cuba's biggest tourist source, with 750,000 visitors in 2025. The UK has also advised against non-essential travel. The Cuban government has shut universities, schools, and public transport to save energy. Students like Adrian Rodriguez Suárez are returning home for remote learning because electricity outside Havana is unreliable. Social media shows public anxieties, with cancellations of events like weddings. Some locals have adapted by making and using charcoal stoves. Diplomats are preparing to leave if conditions worsen, questioning the point of staying without the ability to work. Popular Havana spots, usually vibrant, are now quiet, hosting mostly foreign journalists covering Cuba’s difficult chapter. The island’s future remains uncertain as the US blockade tightens and the government struggles to keep the nation afloat.