<h1>US tariff threat on countries supplying oil to Cuba risks cutting fuel access and triggering acute humanitarian crisis</h1> A US executive threat to impose tariffs on third countries supplying oil to Cuba aims to restrict fuel flows and intensify existing sanctions; that measure directly risks curtailing imports and worsening a humanitarian and infrastructure crisis in Cuba. The Cuban government publicly condemned the threat and declared an international emergency, while potential supplier states are weighing alternatives or continuations of shipments; legal and practical uncertainty about available fuel reserves and sanctions exposure could lead to acute shortages within weeks. The operative effect is heightened extraterritorial pressure on suppliers with immediate humanitarian consequences for the island.