Bees - Fall Checkup

Aagh! I am just devastated. My poor bees - here I thought they were doing great, even overcrowded. I assumed wrong. When I went out to add some space for them to expand, I found that they are practically starving! Too dry, the pond nearby is covered with algae, maybe they are unable to get enough water? Anyway, will be feeding them and setting up a water source right next to the hive. I feel terrible.