Yes, both shade structures and pool covers can help in cooling down a pool. Shade structures such as umbrellas or pergolas provide shade, reducing the amount of direct sunlight reaching the water. This helps to lower the temperature of the pool. Pool covers, especially those designed to reflect sunlight, can prevent heat absorption and keep the water cool. They also minimize evaporation, which helps to maintain the water temperature. By using shade structures or pool covers, you can effectively reduce the heat transfer into the pool and keep the water cooler.