Hot weather can increase your risk of dehydration, especially during outdoor activities, exercise, yard work, or long days spent in the sun. For residents of Waltham, Belmont, Watertown, Lexington, Weston, and nearby Massachusetts communities, recognizing the early signs of dehydration is important for preventing more serious health complications. Dehydration occurs when your body loses more fluids than it takes in, making it difficult to maintain normal bodily functions. While mild dehydration can often be managed ...