Drink plenty of water; your body needs it to prevent dehydration during warm summer days. Take bottles of water with you, if you're going out for any length of time. Remember, infants and toddlers can become dehydrated much more easily than adults, so be sure they get lots of liquids.
If you have asthma or other respiratory problems, watch the air quality report for the day. Limit your time outdoors on days that have moderate to poor air quality outlooks. Plus, don't forget to take your inhaler or other medication when you go out.
Wear appropriate shoes for your outdoor activities. If you're doing a lot of walking or other sports activities, skip those stylish summer sandals. Avoid blisters and sprains by choosing a good pair of walking shoes. Wear them with comfortable, cotton socks.
Take a rest. Don't push beyond your physical limits. At intervals, sit in a shady spot.
Take cover. Sunburn is painful and unhealthy. Use a good sunscreen, and re-apply it frequently during the day. Also, wear a hat to keep cool and shaded.
Wear light, loose-fitting clothing to help you stay cooler.
Don't forget sunglasses to protect your eyes from the sun's UV rays.
Maintain your energy level by limiting your intake of fat and sugar; focus on carbohydrates, fruits and vegetables.
Consume alcohol in moderation, and don't drink at all near the time that you may be driving.