Sixteen US realms have been taken offline for emergency database maintenance
. One of Blizzard's database administrators is on-site to ensure that downtime is kept to a minimum. All are expected to be back online by 11:00 PM PDT, but expect status updates throughout the evening. But if you play on the following realms, you're out of luck for the evening: Agamaggan, Azshara, Dark Iron, Detheroc, Emerald Dream, Greymane, Kalecgos, Lightninghoof, Maelstrom, Malfurion, Moonrunner, Sargeras, Staghelm, Twisting Nether, Ursin, and WildHammer.