My Ac Broke... Again

I live in Florida, and usually we have an AC in my house, and I have a heater in by Betta tank.
We just got home from vaccation, and as soon as I walked upstairs I got worried. I had done a big water change before out ten day trip, and did a 30-40% water change tonight. However, it is almost 90º in my bedroom, and my betta's tank is at 85-86º
My plan was to do another water change in the morning to keep his temperature in he low 80s, and I removed the heater.
Is there anything I can do other than doing water changes with cold-ish water? (I drip the water in over about 30 minutes, so it doesn't shock my fish)

 

Dont add cold water. It changes the water temperature too fast and can cause him to go into shock. Instead get a fan or something and face it to the tank. It should keep it cool.

 

What size tank do you have him in? If it's on the large side you can have a fan over an uncovered tank. This will cause the water to evaporate faster though.

 

bryangar - Not with cold water. I measured it to being about 78º, and siphoned it into the tank using 1/8 inch airline tubing. I only lowered the temperature 2º over 3o minutes. I also turned on a few fans so my room is cooling down. I had needed to do a water change anyway, and the temperature was high enough when I came into my room that it scared me.

West - It is only a five gallon tank, and I have a cat that likes to get into things, so I have to keep a cover on the tank.

 

I’m coming home from vacation too, hopefully my tanks are

 

I've been keeping it below 84 with small water changes. I just did one and my betta's been doing fine thankfully.
I think the increased temperature has been making him hyperactive though.