don't have it blowing on them hard, it's better to have it blowing at the wall right behind them so they get the backwash. when it's hot, plants transpire, sweat, just like us. you do want that to dry out, just not immediately. if they transpire too much, they quit putting effort into new growth, but are still carrying nutrient bearing water up to the leaves to transpire. they can get nute burn from that, and it looks kind of strange. the leaves get kind of dull and thick, then you star to get little spots, that get bigger, and often get misdiagnosed as deficiencies, but it's actually salt burning your leaves from the inside out.