Now, here’s where it gets wild. In many cultures, the go-to drink for a heatwave isn’t a Slurpee—it’s piping hot tea. Think of the Bedouins in the desert or the cha-wallahs in India. They’ve been doing this for centuries, and not just because they’re masochists. A hot drink triggers a release of heat through your skin via a surge in sweat. As that sweat evaporates, it pulls heat away from your body, creating a net cooling effect.
One study from the University of Ottawa showed that after drinking a hot beverage, your total body heat actually decreases over time. The key is that your sweat must be able to evaporate. If you’re in a humid, windless sauna of a city, you’re out of luck—then, a cold drink might be your only friend. But in dry heat, a steaming cup of chai is your secret weapon against the sun.
What About That Brain Freeze, Though?
Let’s be honest: sometimes you don’t care about science. You’re at a beach, or a festival, and that ice-cold bottle calls your name. Fine. But here’s a practical tip: hold the cold drink in your mouth for a moment before swallowing. This triggers the trigeminal nerve, which sends a “cool” signal to your brain without shocking your stomach into shutting down your sweat glands. It’s like a compromise between your pleasure and your physiology.
PPT - Cool down with iced drink PowerPoint Presentation, free download
Also, consider the temperature gradient. Extremely cold drinks (think: slushies) cause your mouth and throat to numb, which delays the sensation of dehydration. You might drink less than you need, making you feel worse later. A cool—not freezing—drink at about 50°F (10°C) is the sweet spot. Your body will actually use it for hydration without fighting it.
