Five reasons you overheat
1. Metabolic rate - The harder a person is exercising, the more thermal heat the body will produce. 2. Conduction - Heat rises from the hot pavement and is transmitted to the body. Darker surfaces draw more heat from the sun. 3. Convection - A hot wind, unlike a cool breeze, actually can add heat and increase a person’s body temperature. 4. Radiation - Sunlight is more intense in the summer and early autumn, and its radiation also raises body temperature. 5. Evaporation ( or lack thereof) - High humidity this time of year makes evaporation less efficient, so sweat drips off the body instead of evaporating and cooling it.