Is your tank a FOWLR? My air has been out since Monday (electricians coming tomorrow to replace the main electrical box)... my main tanks are in a room with a daily temp of 86-degrees, and two fish are in another room with the room temp hitting 93-degrees today. Everyone is acting normally and eating like pigs. You would be amazed how the fish can adapt when the temp rises fairly slowly over the course of a few days. (Of course you want LOTS of oxygen in the tank at such temps.) Now a tank filled with corals... probably a much bigger problem. Best wishes!