Paul, In the summer dehydration creates additional stress as it increases your cortisol levels. Cortisol is a major stress hormone. As your heart rate and breathing increases you become less hydrated. Drinking a glass of water is a simple way to reduce your stress. Staying hydrated is one of your great stress reducing tools. Savor a glass of water when you get up in the morning. Keep water readily available and drink a glass every two hours to refresh your mind and body. Enjoy the great variety of flavorful teas and coffees available during your day instead of water. When you know you are going into a stressful situation drink a glass of water before you get there.