Years ago when I was on the newspaper we ran the headline
"Dry Valley Road Closed Due to Flooding"
Dry Valley Road was a fairly major road in the area, lots of farms and it was a cut through for people. It had a teeny tiny little rivulet that was virtually always dry, and would, on extra rainy days or when a lot of snow was melting, run for 2 or 3 days.
Well, we had the most ungodly wet spring and early summer, and then things got REALLY interesting. We had a storm park right over our area and dump something like 5 inches of rain in about 3 hours on an already incredibly sodden landscape.
Dry Valley Road flooded, and part of it washed out.
That storm also washed out several bridges, and damaged several others (small, old bridges over small roads).
Lots of old men people sitting around in various diners in the area talking about that one for quite awhile.