Monitor their time in the sun while playing at the beach or in the yard. If they are old enough, explain to them the importance of being properly attired in the sun and being careful about activities in the heat. A significant risk factor for skin cancer later in life is severe sunburn in childhood. Becoming acclimated to the heat before taking long runs or engaging in extended exercise is another wise precaution. A heat injury can be life threatening and may result in significant long-term problems.
Appropriate hydration is another requirement for being active in the summer heat.
With heavy exertion in high heat, you can lose more than two quarts of fluid per hour. Long runs should include the occasional water stop and should be timed to avoid the worst heat of the day. Generally, mornings are best and evenings are okay, with noontime and early afternoon often the least advised times to be exercising out in the sun. Sores that don't heal, and large, itchy or bleeding moles or lesions that rapidly change in size or character, should be brought to the attention of your health care provider. These warnings should be specifically directed to all Sailors, Marines, instructors and sports enthusiasts, but everyone, including family members, retirees and the elderly, needs to remain vigilant in avoiding heat and sun injuries.