Prolonged heatwaves and minimal rainfall across Europe have driven the Rhine to record lows at critical gauges such as Kaub, where depths have fallen below historic benchmarks and disrupted commercial navigation. Forecasters from German waterways authorities and economists note that reversing the deficit requires sustained, widespread precipitation rather than isolated showers, with models showing limited near-term relief and a quick return to drier patterns. This keeps early-September recovery odds modest while elevating October and later windows, as traders weigh the narrow window for meaningful rainfall before seasonal shifts. The close spread among mid-September through October outcomes reflects uncertainty over the timing and persistence of any autumn precipitation, alongside the baseline risk that levels remain suppressed into November absent a prolonged wet period.