It didn't end up being that hot. We got one day of 40 and then it rained, hard. Humid for the last two days, but today has been beautiful.The weather here has been all over the place for the last couple of months. The constant high humidity is not good for flowering plants.
Although, I have discovered diluted apple cider vinegar stops mild PM.
I am not giving up on soil. It will have a place along side coco.
Every medium and style has it's own unique properties.
I added a fan to my grow box just before Christmas which, through sheer dumb luck, was perfect timing. It's kept the grow box under 30 degrees even though it was much hotter outside.