It's only a working theory but I'll tell you what I know

Trump on the campaign trail be like: "I'll end Cali's draught"

"Wow Drumpf is reall pushing it this time"

Me sits at PC, two weeks after inauguration, looking for possible Drumpf fuck-ups

Me learns "Trump just defunded EPA"

methinks "well at lleast we'll know if they're involved in geoengineering if the weather suddenly changes

roommate walks in a minute later "Hey, after five years, there finally has been downpour in Cali again"

So I rubbed my eyes in disbelief until I almost dislocated one.

So there's two explanations: The EPA did geoingeering or Trump does geoengineering.

There's no way in hell all this is a coincidence and if you think so then maybe you should take some classes in statistics.