Yep, I can no longer see my Cloud SQL database - it's as if I've never created one at all. Really hoping this is just an issue displaying it and that Google hasn't punted my infrastructure and backups.
Reports claim that it's a network congestion issue primarily in the northeast United States. It seems doubtful that any data has been lost, but you probably can't see resources due to requests not getting through. I hope that hearing this helps you to feel better.
This is a networking issue, and your data is safe. Cloud SQL stores instance metadata regionally, so it shares a failure domain with the data it describes. When the region is down or inaccessible, instances are missing from the list results, but that doesn't say anything about the instance availability from within region.
