<p>Most schools may have SOME folks on vacation when summer school ends & before the school year begins, but there should be SOME staff on hand to help out–the registrar, the college counselor, your grade-level counselor, etc. The HS will know that this affects you & THE HS (its rep, etc is at stake, since they want their grads to be placed at appropriate schools & matriculate & graduate from such schools).
In the meantime, you should fax UCSD your final report card, showing your senior grades & a note telling them that you and your HS will be contacting them 1st thing Monday morning, with contact info (cell phone, etc.)</p>