Warm weather always inspires us to make a beeline for the nearest lake or beach. While most of us remember to bring the essentials, few are fully aware of the less obvious health risks that can come with having fun in the sun, many of them from dehydration. We talked with Elke Cooke, MD, a California-based doctor who specializes in emergency and functional medicine for women, to get a list of sneaky symptoms to look out for plus a guide of water-rich foods to reach for this summer.