I do not believe I have heat issues, tent is always 76-81 daytime and upper 60's at night. Humidity 37-44.This is about that time of the year when it can get absolutely brutal. Took me a few years to get a grip on it without too much issue. Before that, I would just grow photo trees outside for fun and ditch growing autos inside until fall.
Run your lights on an opposite schedule so that they're off during the hottest part of the day. Run your lights a little higher/dim them a little. And figure out a way to raise the humidity to match the higher temps.