[Update] The grid issues have now been resolved, regions that were down should now be up or on their way up shortly. For any regions that do not recover, please use the usual method and report them to us through the support portal.
We are having some Grid problems currently, causing some regions to become inaccessible and to remain down. Engineers have been paged, so hopefully this will be resolved very soon and we can get those regions back up for you.
We will post updates on the situation here as soon as we know more. Thanks for your patience.