Here is what AMAWaterways have on their site
Sailings Impacted by Water Levels
Our experienced teams are monitoring the situation in Europe very closely and no sailings have been suspended.
Safety remains our top priority and we have alternative plans in place should the local authorities temporarily curtail river traffic on any portions of the Rhine or Danube rivers. These plans may include alternative docking locations, modified shore excursions as well as ship swaps, if necessary.
As the water levels on the rivers can change quickly, we have a dedicated communications team in place to alert our guests and valued travel advisors of any modifications affecting their upcoming river cruise vacations and assist with any changes that may be required. Whatever itinerary our ships sail, our staff and crew around the globe remain dedicated to ensuring that our guests have the most enjoyable vacation possible.