Is it permissible for a girl to remove her headscarf in the women's section of a mosque under the pretext of heat or to adjust the headscarf?

A woman is permitted to remove her hijab in a place concealed from the sight of non-mahram men, provided she is careful not to expose her awrah, which is forbidden by Sharia. She should also not remove her clothes outside her home, for the Messenger of Allah, peace and blessings be upon him, said: "No woman removes her clothes in other than her home except that she has torn down what is between her and Allah."