The storm dropped about 3.5 inches at our house in a couple of hours. That wasn't nearly as much as other places around town--my sister's house got almost eight inches and water was lapping at her foundation--but enough that I felt the new beds were put to the test.
I'd had visions of tons--literally* tons!--of granite washing out into the street and finding all the plants uprooted and crammed up against the back gate, but this was the only real damage.
It's a strip about two feet wide where water running down the driveway finds a spot to make a sharp turn down to the yard below. We'll put down some larger rocks and coarser, heavier gravel to give that water something to run through, then maybe top it off with some good old decomposed granite to make it look finished. No big deal.
Considering how much damage was done to other parts of the area, this is very small potatoes indeed.
Thanks to everyone for the feedback and nice words, on the blog and off. You guys are nice.
*I mean "literally" in the literal sense of the word.