Several realms (Andorhal, Anetheron, Archimonde, Dalaran, Dentarg, Duskwood, Executus, Haomarush, Khadgar, Mal'Ganis, Scilla, Steamwheedle Cartel, Turalyon, Ysera, Ysondre, and Zuluhed) were brought down tonight for urgent maintenance around 5:15 PST with a note that expected downtime was to be minimal.  The servers seemed to pop up online again not so long after but the uptime doesn't seem to have last - around 6:30 PST most (all?) are offline again.  Oddly, all of these servers appear to be those running on new hardware...

This article was originally published on WoW Insider.