what's your tank temp running at ?

[Xtasia]

if your tank is still cycling, and you have no livestock/corals, I'd just turn your lights off for a few days until the heat passes, put a fan over your tank...

If this isn't a solution for you and you live somewhere where heat is abig problem.. and a chiller isn't affordable for you, you might want to consider coming back into the hobby when you can afford a chiller, simply because you have so much more to overcome you need to be more prepared than most.