<h1>US crackdown on Venezuela-linked oil tankers and tightened Cuba sanctions raise shipping risks, disrupting fuel supplies and power shortages.</h1> US enforcement actions reportedly intensified against oil tankers linked to Venezuela, including seizures of multiple vessels as part of a broader effort to restrict and control the international distribution of Venezuelan oil products. This escalated interdiction effectively increases legal and operational risk for maritime transport of Venezuelan-origin oil and may disrupt supply chains irrespective of destination. In parallel, continued tightening and application of US economic sanctions aimed at political pressure on Cuba is described as constraining trade and financial channels across sectors, with the practical consequence of aggravating fuel and electricity shortages on the island, potentially accelerating migration pressures and civil unrest if Venezuelan oil shipments are interrupted.