[ Harry has a box of bandages under one arm and a large bottle of water in the other hand and he has to be in two places at the same time with them, so yes, he could certainly use a hand. ]

Ah—thank you. There is a family in that tent there—I believe they are suffering from dehydration. Can you bring this water to them? There are two more bottles set aside for them as well And that box there—it has a supplement for the water that will help.

[ It's electrolyte powder, a substance that seems nothing short of miraculous to Harry now that he knows what it is. ]

Instruct them to add one envelope of the powder to each glass of water, and drink it slowly.