It’s normal for it to feel hotter than the recorded temperature. That’s because the heat index combines air temperature and humidity.
The heat index, often referred to as the “feels like” temperature, measures how it feels outside by combining the air temperature with the amount of humidity. When humidity is high, sweat evaporates more slowly, making it difficult for the body to cool itself.
Sweating is the body’s natural cooling system. As sweat evaporates from your skin, it helps lower your body temperature. However, when the air is humid, sweat doesn’t evaporate at the same speed. Consequently, your body retains more heat and gives off a hotter sensation.
If the air temperature is 92 degrees with a high index, it can feel closer to 105 degrees. For this reason, checking the heat index can provide a better picture of how it feels outside.
A high heat index increases the risk of heat-related illnesses, especially for people spending long periods outdoors. Outdoor workers, athletes, young children, or older adults and people with chronic medical conditions are among those most vulnerable during extreme heat.
When the heat index is high, drink plenty of water throughout the day, even if you don’t feel thirsty. Wear lightweight, light-colored clothing and take frequent breaks in the shade or in an air-conditioned building. Limit outdoor activities during the hottest part of the day. Never leave children or pets in a parked vehicle, even for a few minutes, as temperatures inside a car can rise rapidly.
Before heading outside this summer, don’t just check the air temperature, look at the heat index too. To have a better idea of how it will feel outside, explore the latest weather updates online at South Carolina ETV and Public Radio.