Heat related illness is a very serious issue in Charleston. Anyone who works in a hot environment is at risk of heat stress. Heat stress symptoms can include dry skin, dizziness, nausea, fatigue and increased body temperature. You should always keep an eye out for these symptoms in your wingmen as well as yourself and be mindful of heat stress conditions. The flag conditions, and heat categories are there to help enhance awareness of potentially dangerous weather likely to cause heat stress, as well as provide basic guidance on work rest cycles and fluid consumption. (U.S. Air Force Illustration)