There is a single cooling water system for all the main generators and it failed causing all to be shut down. The emergency generators basically run emergency lights, communications, PA system and (hopefully) winches to lower lifeboats. The full power outage began at 5:00am and lasted until about 7:00. The two other outages were partial so there were some lights but no air conditioning or toilets. Things are back in shape now.
I've been to Fortaleza 3 times before and we aren't missing anything except a crummy market by cancelling a 4 hour stop.
Jim