The Austrian section is nowhere near the Dutch one; neighbours the Spanish area.
The Flume, AlpenExpress & Diamond Mine are the main victims, belief is that it broke out in one of the technical backstage areas of the Mine. Some of Spanish buildings also bore the brunt. Fortunately the fire was seemingly contained and didn't spread too far. Pics from inside the building below (TW for destroyed Log Flume).
However park reopens today. Tweet from Michael Mack shows some damage.
Troublesome though. Might not be so lucky if it happens again.