The heat may be a shock to many peoples systems -- take the heat seriously and watch out for these red flags. The heat doesn't mean life stops, so a lot of people either have to, or choose to, stay active outdoors. How you feelThe first red flag that the heat is taking a toll is obvious in how you feel. Bathroom trips, urine colorAnother red flag may seem indelicate, but it's very practical and important. Blacking outAs someone's body temperature becomes dangerously high the biggest red flag to watch for is confusion and blacking out, almost like being drunk.

However, infants and toddlers, people who are 65 or older, anyone who is overweight and people on certain medications can be at the highest risk for heat-related illnesses, according to the Centers for Disease Control and Precention (CDC). Those illnesses can include heat stroke, heat exhaustion, heat cramps, sunburn and heat rash. According to the CDC, people suffer heat-related illness when the bodys temperature control system is overloaded. In such cases, a persons body temperature rises rapidly. When the humidity is high, sweat will not evaporate as quickly, preventing the body from releasing heat quickly.