There was a fire on one OVH data centers (Strasbourg) http://travaux.ovh.net/?do=details&id=49484 and from what I could understand the building is lost.
In case you don't know. I use OVH to host all of Masto.host but thankfully everything is hosted on a different data center in France, with the exception of backups. The backups were in the building that burned.
So, everything is working in production, just not sure if the backups from the last days were lost.