Thia is supposed to happen today:
On May 29th, between 4:00pm and 10:00pm PST, we will be performing a few upgrades on your shared MySQL server, [name redacted].
We expect the process to take up to 30 minutes total, and once this has completed, your MySQL server will be running Ubuntu Bionic and MySQL 5.7.
You may notice that your MySQL databases are unreachable for brief periods, or your website may behave unexpectedly while we complete the upgrade. This is normal, and your sites and databases will be back online as soon as the upgrade is complete!
Having watched these guys at work for the last 17 years or so, I’m figuring on 15-20 minutes of Wacky Misbehavior.