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.
Unlike in spring, you should now crowd the bees by giving them only one or two honey supers. This forces bees to store honey in the brood nest. Colonies are usually overwintered in two hive bodies or in one hive body and at least one honey super. Colonies should weigh at least 100 pounds in late fall.