Answer:
Johns Hopkins has the following advice for avoiding dehydration and heat stroke: You should drink plenty of fluids, especially when working or playing in the sun. Water and sports drinks are acceptable. Caffeinated tea, coffee and soda, as well as alcohol, should be avoided because they speed up dehydration.
Follow these four steps to prevent dehydration:
Drink plenty of water, as directed by your doctor.
Eat foods with high amounts of water like fruits and vegetables.
Avoid or limit drinks with caffeine like coffee, teas and soft drinks.
Avoid or limit drinks with alcohol.
