This Wednesday there will be a scheduled maintenance. The majority of realms will remain online during the maintenance with rolling restarts for each realm around the time 05:00 to 06:00, Paris time (CEST).

However the following realms will be brought down fully for maintenance from 03:00 to 10:00, Paris time (CEST):

Auchindoun
Ghostlands
Hellfire
Karazhan
Nagrand
Shattered Halls
Sporeggar
The Sha'tar

Edit: the maintenance has been extended until 10:00, Paris time (CEST)

Thank you for your patience and understanding.

Blizzard Europe

[ Post edited by Gamemaster ]

The maintenance on these realms has been extended further until 11:00, Paris time (CEST).

We apologize for the delay, and appreciate your patience and understanding.

Unfortunately, the end of this maintenance has been pushed towards an estimate of 13:00, Paris time (CEST).

We apologize for the further delay, and appreciate your patience and understanding.

We are aware of the instability issues on these realms, and are working to address the issue as we speak.
The current ETA is ~30 minutes to have the problem corrected.

We apologize for the inconvenience once more.