It is HOT and humid down below this week and as I mentioned yesterday, pack lots of extra water and be sure to drink as you hike, even if you don't necessarily feel thirsty. Preventing dehydration is leaps and bounds easier than treating it! The most helpful piece of hiking (and any other kind of activity!) advice I have been given in a long time: Drink before you are thirsty, eat before you are hungry and rest before you are tired. This will keep you hiking at your best!