AdvertisementBusinessMarketsOil Opinion War and drought: Another critical oil waterway is about to closeJavier Blas July 30, 2026 — 5:00am Save You have reached your maximum number of saved items. Parts of the crucial river Rhine have dried out after Europe’s heatwaves. The US-Iran war has reminded the world that waterways are vulnerable to war. If the water level continues to drop as expected, they may not be able to carry enough to justify the effort by the end of the week. AdvertisementThe US-Iran war has reminded the world that waterways are vulnerable to war.