On these hot summer days, it can seem like you're driving in a greenhouse. You probably already know that you need to drink plenty of liquids, even if you're not thirsty, to stay hydrated and avoid heat stroke. But here's some cool advice you might not be aware of:

White is Nice
What you wear can make a difference in comfort. Scientific studies have shown that wearing white clothing reflects the sun's heat, while black clothing absorbs sunlight. When you're sitting behind the wheel all day, it pays to have any advantage over the heat.

Peak of the Heat
High noon isn't the hottest time of day: it's actually between 4 p.m.-5 p.m. Plan your breaks accordingly by stepping into an air-conditioned location such as a restaurant or shopping center during this peak heat hour.

Lite is Right
Your body's working hard enough to keep you cool. Don't tax it more by making it digest a heavy meal. Studies have shown that digesting protein uses twice as much metabolism as digesting carbohydrates and fats. That means you generate more heat eating a steak than if you ate water-based or chilled food like fruit or yogurt.

Blow it Out
On the hottest days, it may seem that a fan is just moving the hot air around. But scientific studies show that air in motion helps the sweat on your skin evaporate, which will make you feel cooler. So consider one of those dashboard fans, or even a handheld fan if you're stopped somewhere without air conditioning. The moving air will help your inner thermostat cool off your body.