The frequency of so-called 100 year storms has become pretty spooky. We had a 100 year storm a few years back which dumped 16” of rainwater in about 24 hours in the area. It mostly re-routed 2 larger rivers, took out the roadways along the rivers in places over about 20 miles, eroded the foundation of a dam enough to take it out of service, and essentially re-designed many neighborhoods up to 40 miles downstream.

We’ve had 2 more similar storms since then.