Any Info on 2015 European River Water Levels?

My wife and I are booked on the May 22 Grand European Cruise Westbound. A month or so ago, Tauck sent us a cute little cartoon about the River Gods who could wreak havoc with the river water levels. I am wondering if anyone has any information about whether the River Gods are behaving themselves or whether we may face too high or too low water levels. This tour combines the Black Sea to Budapest and Budapest to Amsterdam cruises. Thanks for any information you can provide.

Greg Jones