Often, you'll get a faster and sometimes more appropriate help in the Emergency Forum.
Now, my guess would the heat. Bring her inside if you can, and put her in a cool, but not cold, bath. Regular tap water temperature is probably fine. Also, make sure to give her water with electrolytes in it, like Pediasure. As she professes some, try a softer food like scrambled eggs or raw yogurt. Both are excellent.
Keep us posted.
Now, my guess would the heat. Bring her inside if you can, and put her in a cool, but not cold, bath. Regular tap water temperature is probably fine. Also, make sure to give her water with electrolytes in it, like Pediasure. As she professes some, try a softer food like scrambled eggs or raw yogurt. Both are excellent.
Keep us posted.