As we were out of water, we had to use water from the streams and rivers. It tasted a bit different from normal water. However, we mixed that Himalayan water with an electrolyte and it tasted fruity. The meaning of thirst is what we have learned in the highlands. Whenever you are on hike, you have to have water in 30-60 mins in order to rehydrate your body. So, your brain works in higher level. It's important to prioritize hydration for your body and brain.