I lived in LA for 20 years. I call this situation of being surrounded by attacking rioters a "Reginald Denny Situation" named after the guy who was too nice to run the bastards over in his truck and instead got pulled out and got his head bashed in with a cinder block... amongst other things.
RUN THE BASTARDS OVER!!! F'EM!!!
Carry your gun ON YOU, loaded, and ready to go. If you can't drive away one way or another... SHOOT THEM. Clear a path and RUN... and keep running (and shooting if you need too) until you get to the nearest open gun store and reload and restock, in that order... then get going... get out of there and get to your next car... cuz your old car is gone. Get on with your life... and don't lose a minute of sleep over it... although, you more than likely will. Count your blessings that you did the right thing and didn't get your head bashed in and/or get killed. Go have a good beer and say "CHEERS! LIFE IS GOOD!"
If you're living i LA and you have a half a brain... MOVE! Go find a better place to live. I did, and it's the best decision i ever made.