I had quail, who can usually run minutes after hatching, take 2 days to be able to stand properly. I just kept giving it water by dripping it onto my hand and letting it drink it off as the yolk sac had it covered for food, and I did see it eating even though it couldn't stand properly.
When we was getting the brooder sorted out for my 5 silkie chicks as the hen decided she didn't want them, I kept them warm by cuddling them close and making a 'pouch' in my jumper to carry them in for when my hands were needed.
Though glad you got the heat sorted out ^^ As for the weak...