Blowdryer with straightening serum or get your hair perm. straightened by chemicals.
If that doesnt work, wear your hair in a ponytail
I have a scene haircut, and when I went to camp we were aloud to bring straightners, but it was so hot and humid it make my hair curl so it was no use. I wore my hair up in a high ponytail, with my bangs out and some hair strips near my face. Dont worry, itll look fine.