The team posted an announcement on this page for Qlik Sense Cloud users. (you can see it at the top of this forum)
ANNOUNCEMENT:Upcoming Qlik Sense Cloud Maintenance - Wednesday November 9th, 2016 at 2PM
by Karl Humma (November 6, 2016)
Qlik Sense Cloud will be unavailable for maintenance beginning Wednesday, November 9th, 2016 at 2:00PM EDT. The upgrade is expected to take 4 hours, but could take longer. We apologize for any inconvenience.
I checked and everything should be up and running.