How much water do you drink throughout the day? If you live in a hot and humid environment, you will want to drink more than the average person. When the body becomes dehydrated, headaches are one of the symptoms. You can also watch out for other symptoms such as feeling thirsty, yellow urine, or a dry mouth. If you struggle to drink enough water throughout the day, consider adding drinks with electrolytes into your day. Staying hydrated can help prevent frequent headaches.