It's easy to become dehydrated in the summer. Increased physical activity coupled by more time spent in the hot sun can contribute to dehydration. Often, people don't even realize they're dehydrated because they don't feel thirsty.
In addition to the impact of dehydration on the body, even mild dehydration can impact a person's driving ability. In fact, researchers at a university in the United Kingdom determined that dehydrated driving can be every bit as hazardous as drunk driving.