There is a very high possibility of some heat related illness, dehydration, or some other lesser illness.
What she would want to do is get her into some shade or a cool building, have her drink a lot of water.... A lot of water. If she has a condition involving byproducts of muscle tearing she needs to flush. You also want to make sure that she has something that will keep her cool like ice. Lastly, take her to a Healthcare provider or call an ambulance.