Here's the response I received from the host on what was the cause.
Hi, Firstly, sincere apologies for the downtime and the inconveniences caused. Our team identified the issue to a switch failure and unfortunately HA too failed, which does not happen normally. Our engineering team configured new switches and our staff had to fly to Chicago DC (Data Center) with the new switches. We tried to repair the existing switches, which was in vain and replaced them with new switches. Our engineering team implemented new process and procedures to make sure this does not happen in future. We thank you for your patience and understanding, while we were fixing the issue and once again our apologies for the inconveniences caused.
Hopefully this is the last outage we have for a while...
