Extreme heat brings out the flowers in our bouganvillea. Temps will be in the 110-112 range today and rising to 114-115 by Tuesday/Wednesday. Once the temperature gets over 108, you can feel the difference. Yes, there's a very real difference between 108 and 110. Will be a tough week for the plants. I may have to change their positions and bring them under cover, much as I would if a hard frost were coming.