I'm working at a modeling camp this year. Even though it is a camp, they have designers and speakers that come in to talk to the girls and I think it's a good way to kind of get contacts and also learn.
And also keep in mind that your summer job doesn't have to be directly related to/ or have to deal with fashion to get into the fashion industry in terms of jobs. Look for possibly summer journalism jobs, maybe writing for a local paper or in a floral shop, etc. This way if your into the magazine aspect you get writing experience, and if your into the design aspect you get a type of design experience that may be helpful for you.
You never know when these skills will come in handy in a later job so don't shut things out if they aren't exactly what you're looking for. Be open and people will become open to you leading to many opportunities.