Or I could tell her to go to the bathroom, fan herself out or whatever girls do in there for an hour long, and then come back to resume her work.
Bismellah Irrahman Irraheem
Assalaamu Alikum Wa Rahmatullahi Wa Barakaatuh
that what I was about to tell ya my respected brother...when you deal with children try your best to ease things for them unless, you will find them disagreeing with ya, disobeying you and start treating you in another way ...Not because of stubbornness, but because of their innocent nature so they act spontaneously...
I was about to tell ya ...to agree with her and say : yes, you are right. it is really hot in here so, you can go to the bathroom if you want to take your Hijaab off there where no man can see ya my respected sister ,wash your face, fan your self and come back when you are comfortable...and tell her to try not to take a long time there unless, everyone will be worried about her...
you may buy some cold juice for the kids and tell them from the begining: if anyone of you got tierd because of the hot weather then I bought this juice for ya my lil respected sisters to reduce your tiredness and whoever wants to go to the bathroom to wash her face just ask me my permission to let me know where you are going for your safety in shaa Allah...
I won`t blame her taking off her Hijaab cause she is still a child even if she reached puberty at that too young age; she still has a brain of a child and children are not patient especially when they are too tired and desiring something badly...
my entire life I have lived with children playing with them till this moment of my life and never been with adults more than children so, I know them cause humbly I am still one of them...
May Allah love you brother for your concern and reward you with the Highest level of the paradise without being reckoning Ameeeen