Prolonged drought across the Rhine basin, driven by multiple heatwaves, below-average Alpine snowpack, and minimal rainfall through spring and summer 2026, has pushed gauges like Kaub to record lows well below prior benchmarks such as 2018. These conditions have sharply curtailed barge loads and inland navigation, with only marginal, short-lived rebounds from isolated light rain in late July and early August failing to restore viable depths. Trader pricing remains tightly clustered because sustained recovery hinges on consistent precipitation across the upper catchment through autumn, an outcome current meteorological outlooks treat as uncertain rather than assured. A decisive shift toward wetter patterns could accelerate normalization into September, while continued dryness would sustain restrictions well past October and support the elevated probability on later or non-recovery intervals.