That's what it feels like! In Dallas, it's like the dry heat of an oven when I walk outside and I feel like my skin is too hot. In Houston, it's like a sauna and I feel hot and sticky.
Stay hydrated, seriously. You'll be alright as long as you're hydrated and know how to cool your body down if you get overheated. There are some electrolytes in drinks like Gatorade and Powerade, but they have a lot of sugar. The reason I give my friends pedialyte (the orange color is fruit flavored and the best tasting) is because it's not like I can give them a saline drip (salt water) and pedialyte has much needed electrolytes your body loses through sweat! I wear a lot of Dri Fit (moisture wicking) clothes in the summer, lighter colors, breathable fabrics. Sundresses and sandals for me... All summer long! Stay indoors during the hottest hours, if you can. Know your body and listen to it when it's telling you something isn't right.
I'm not a doctor, not a nurse although I did learn a lot when I worked in an emergency room. But I am a woman who is an older sister, and "the mom" in my group of friends so I have seen enough to know how to take care of people when I recognize certain symptoms.