It was bound to happen.
As for the previous rains, I don't know about anywhere else, but when a storm is forming right over town, it seems to want to keep backbuilding. The clouds billow up, gets dark, and just lets loose with quarter to half dollar sized rain drops. Then, just about when it looks like is over and past us, a new cluster pops up and repeats the process. I've seen it in other years as well.
Usually we get the split, or the line falls apart or disintegrates, but if they build at the right location in the right conditions, we get DUMPED on.