Hi Jenn, I’d just keep them well watered. At those temps, the plants aren’t focused on growing or even really flowering, but remaining alive. Water is what they need, a steady supply of it. While fish emulsion isn’t as “salty” as many other kinds of fertilizer, the nitrogen in it can help push the plants to want to produce more growth when they’re best served just maintaining in the heat. Once the temps drop back into the less stressful range, feed them all the fish emulsion you wish, but for these extremes, I’d just keep watering. Good luck! I don’t envy those temps!