Mississippians saw record-breaking temperatures in July, and while August started cooler, more heat is in store. According to the National Oceanic and Atmospheric Administration, Jackson saw five days in July where temperatures reached 100 degree or more, setting one new record and tying another. Linda Patterson, health education specialist at Mississippi State University's Extension Service, said heat can be simply unpleasant, or it can lead to life-threatening heat stroke. When the heat index is this high, prolonged exposure or physical activity can lead to several illnesses such as heat stroke, heat cramps or heat exhaustion. The heat index combines the effects of heat and humidity, and is the opposite of wind chill.
Warm temperatures feel even warmer when there is high humidity.
Heat illnesses occur when the heat overcomes the body's ability to regulate internal body temperature at a safe level. Signs of heat illness include nausea, weakness, fainting and pale, clammy skin. Often, the skin turns red and dry, providing a warning signal of heat illness. According to NOAA, there are four kinds of heat-related illnesses. Sunburn is redness and pain in the skin, with possible swelling, blisters, fever and headache.