Hey NX811..
If I haven't mentioned already, congrats for getting in! I'm glad you felt comfortable during your visit at COMP. Let us know if you have any more questions (and visit the COMP 2005 and 2006 threads too!).. I'm sure we can help answer any concerns regarding apartments to look into around here and other things to do around the area.
Oh yeah, it does get warm during the summer, but often times there is a nice cool breeze somewhere if you wait long enough. That applies even moreso if you drive about 35-45 minutes inland towards the coast (go to the beach!). I'm sure either way, it's probably not as hot as AZ though.. heh.
As far as moving to LA, you're still about 45 minutes west of LA.. have you been around California before other than visiting schools? I've been around for two years and slowly have gotten used to it, but I do enjoy being here.