There was some discussion here about low water levels in the Rhine last fall, and the effects of that on various tourist river cruises. Regrettably the following appeared in the Economist in a recent issue:
"The Alps are Europe’s water tower. They provide 25-50% of the water running through the continent’s main rivers, the Danube, the Po, the Rhine and the Rhone. With so little snow to melt in the coming months, river levels are likely to be unusually low, and with them water supplies for the people and the plants along their banks."
This will be a major economic challenge for shipping as well as tourism.
Hope for the best.