California is about to get super fucked with flooding.
I didn't realize how infrequent they are, but apparently there have only been two tropical storms to hit Southern California in the last century. And both were fizzled to almost nothing. This one is going to hit Baja as a category 4 or 5, and might actually still be quite strong by the time it works its way up to California.
For areas that only get a few inches of rainfall all year, getting it in one day is going to be crazy. Like I know normal 0.1" rainfalls in the desert and our roads would all flood. They're forecast to get 4-8 inches.