Help: Cool off tank

[bear27]

I went away for the weekend for my cousins wedding and when i came home i looked in my tank and nothing was very happy so i started looking for possible causes and found my temp to be 85 deg despite a 12 inch fan running over it

I turned it to its highest setting(was on med) and topped it of to allow the air more direct access but i think i might lose one of my clams,Hydnopora and my acopora any ideas