We are aware that some US East worlds are offline: 18, 22, 27, 39, 44, 48.
This has been caused by a hardware issue. Our team is currently hard at work to resolve this and bring the worlds back online.
We apologise for any inconvenience caused.
Update June 10th 16:02
Worlds 22 & 39 are back up. We will be monitoring their performance before others are restored.
There is a chance server performance might be different than normal, so we advise caution with high risk activities.