It was so hot here yesterday, I fired up the oven to cool off the kitchen.
It was so hot, I had to hold my cold beverage in my hand. The drink coaster was set on "boil."
It was so hot, everything electric or electronic stopped working. Garage door. Phone. Internet service.
It was so hot, running a fan in the bedroom was like Satan laughing at me with stinky breath.
It was so hot — and this is true, eerie, sad — that bumblebees died in midair and fell out of the sky. We actually watched it happen and picked up their carcasses.