The Rhine is rising again. The logistics risk remains.

The Rhine has recovered from the extreme lows of mid-August. Germany’s Federal Institute of Hydrology reported 56 cm at Kaub early on 24 August, well above the sub-10 cm level S&P Global reported on 14 August. That is meaningful relief for shipping, but it is not a reason to treat the episode as finished.

Water level and usable cargo capacity are not the same thing. Barges have to adjust their draught; at very low levels they carry far less cargo, so the same volume requires more trips and more vessels. The first consequences appear in freight rates and delivery times, and later can feed into production and energy costs.

Kaub matters because it marks a shallow stretch of the Middle Rhine. S&P Global reported 45 cm on 21 August and heavily restricted barge loads, while freight costs remained far above July levels. A single gauge therefore becomes an early indicator for supply chains in chemicals, energy, steel and other industries located along the river.

The obvious response to low water is to move freight to rail or road. In practice those alternatives are limited. Large volumes of bulk goods, fuels and chemicals cannot be replaced one for one at short notice. Spare trucks or rail paths have to exist, terminals need capacity and costs rise. For parts of German industry, the Rhine is therefore not merely one option among many but a systemic transport artery.

The Bundesbank describes the German economy as being on a recovery path in the second quarter. Exports and industry have been more resilient, but capacity utilisation and investment remain subdued. In that environment logistics shocks can have outsized effects: companies that are only beginning to see stronger orders are especially sensitive to transport shortages, higher freight rates or uncertain delivery times.

The rising gauge shows how quickly the operational situation can improve. But the episode also shows that low water has to be treated as a recurring business risk. Larger inventories, adapted barges, alternative terminals and stronger rail links cost more than a perfectly functioning river — but less than emergency logistics. The sensible conclusion is neither complacency nor permanent panic, but more redundancy in an infrastructure system whose vulnerability is now visible.