Orange County isn’t LA, but I know what you mean. Southern California (mostly LA and OC counties) certainly seem to have a disproportionate amount of high speed chases. It’s almost expected.

Either that or they’re disproportionately covered nationally (or on large cable news networks during the day).

I’m in San Diego county and it seems like we hardly ever have chases like they do in the two counties to the north of us. We sometimes have one, San Bernardino sometimes has one but they are far less common.