The primary safety concern here is traffic.  Local highways and interstates are typically very busy and very crowded.  Fast-driving residents mixed with tourist drivers reading maps while driving on unfamiliar highways is a recipe for an accident.  If you are planning on driving in the area, be sure to study your maps and plan your routes beforehand, as you will need to be very attentive to keep up with the pace of the busy highways.   Be sure to allow plenty of extra time for traffic delays and avoid becoming a victim of road rage.

At the local beaches, pay particular attention to the safety of your belongings.  Most beaches in the area are staffed with life guards, but you should always take responsibility for your own safety in the ocean, and watch children closely.  This is Sunny California, so remember to use sunscreen or a beach umbrella to avoid burns.