So when they went into drought your plant used it storage from the leaves to survive. Looks like a nitrogen deficiency. Just get things back on track with watering and temps and she should come back healthier. Youre pretty far into flower so I wouldn’t up your nutrients or anything just whatever feed you were giving prior to the drought and heat
You're already answering your own question, it comes from heat stress and possibly nutrient deficiency as a result. Best to get yourself an air conditioner.