Please create a "Region Offline", "Region Restarting" or "Region About To Restart" warning prompt in the login screen which detects what region you're attempting to log in to, including your Home, Last Login or from a specific region name.
Then if the requested region is "Region Offline", "Region Restarting" or "Region About To Restart", the log in screen should suggest an alternative online location where it is currently safe to login to.
This would prevent the frustration felt by people unable to log in to Second Life at their usual or last location, or lack the ability to log in by manually elsewhere by typing in another region name.