Where did all this rain come from?

It's raining so hard right now in SoCal, it's only December, where is all the rain coming from?? I can't even imagine all the trash that is being washed into Colorado Lagoon, next Monday trash clean-up is going to be so intense. This is a strange pattern of weather...I don't know if I have seen it rain this hard ever before here in December, oh well, it's probably just a strange year...right?? Maybe it's the beginning of climate change...who really knows, we can debate over it over and over again but no one will have the answer, only time can tell.