@RonJax2 - there could be multiple reasons to bring down a website, mostly for maintenance and backend updates. 1.) they could be updating the site and took it offline (the actual site), 2.) probably the most common issue is the web hosting went down with connection or server issues (again this is common if you don't have redundancy) and 3.) backend end database changes or updates forcing the site to need to go down if clusters are not set up.
There are a lot more but those are basic reasons.
Regarding a website getting hacked, that is a high probability as well since it is one of the only servers that could run outside a DMZ or internal network. Locking those down are much harder.
The issue with a hacked website usually isn't the website itself, it is the connection to a database or data stored on a site with forms and stuff.
Anyways log way of saying probably not as big of it is up and running again. Yet until we know who really knows....lol