In summertime the living may seem easy, but the dangers are real, even for healthy adults. Real Simple's guide can help you make informed decisions about the season's ills and spills.

This guide is for generally healthy adults. Decisions on when to seek care can vary greatly for children, the elderly, or anyone with a preexisting condition, says Tom Scaletta, M.D., board member of the American Association of Emergency Medicine. The advice given here should not supersede common sense or your doctor's opinion.