Now that summer is here, the days are getting hotter and hotter. And because of that, I feel compelled to talk about dehydration. I’ve written ad nauseum about how important it is to stay hydrated—for better skin, weight maintenance, and overall better health—but we don’t talk enough about dehydration.

Dehydration, defined as when you use or lose more fluid than you take in, can lead to serious symptoms and health issues, like heat injury, urinary or kidney problems, low blood volume shock, and even seizures. In the warmer summer months (when we’re more likely to sweat), we’re more prone to dehydration and have to be more conscious about our fluid intake. We can’t wait until we feel thirsty to have a drink or hydrate—by then, we’re already dehydrated.