My recollection is the SFBA gets around 20 inches of rain annually. Three inches in a few days time is 15 percent of the rain it is supposed to get all year. I

My recollection is the SFBA gets around 20 inches of rain annually. Three inches in a few days time is 15 percent of the rain it is supposed to get all year. It's a lot. The landscape won't cope well, especially if it's already seen rain prior. We saw 2 inches of rain one day in The High Desert, an area that gets 6 inches annually. The flood waters took weeks to recede and brine shrimp hatched out.