Here are two more resources for understanding the extent of the flooding in Germany.

Hochwasser Zentralen - All the centers dealing with floods. A color-coded map thtat shows the extent of the flooding all over Germany.

Video:  Luftaufnahmen vom Hochwasser in Deggendorf und Umgebung - Aerial shots of the flooding in Debbendorf and the surrounding area.

This video blends in the name of each location as they show it, so you can grab a map and search for each village simultaneously.