So I've looked through the literature and I found a review article saying all of this and more. It was written by a group of respected physicians from American and French hospitals and it clearly supported the widely held belief that you should drink two to three litres of water a day.
This is a common occurrence to have your brood chamber become honey bound during the main nectar flow. A typical hive body will have a brood cluster in the middle and the outside frames will contain honey. A honey bound hive happens when brood begins to emerge, it is replaced with nectar.
A colony can become honey bound if there is no more room for the queen to lay eggs because a) the honey stores are full and the brood nest can't expand into it or b) the bees think the honey area is full and the bees won't expand into it.