I was going to say the same thing but I am tired of getting harassed by the weather modification deniers.
If only that applied just to weather modification.
Applies to a thousand other things...
Getting flak is the sign of being over the target.
Flood maps are based on a statistical analysis. The hypothetical 100 year flood is the standard.
I lived in an Appalachian county that had three floods above the 100 year level in less than 100 years.
The 1985 flood which is the flood of record for much of the Northeast was calculated to be a 2,200 year flood.
I have no doubt insurance companies would love to sell insurance policies to all of the properties out of the 100 year flood plain that flooded in 1985.
The worse possible flood is a probable maximum flood (PMF). Only one of those has occurred in the entire northern hemisphere. A PMF is orders of magnitude worse than the 1985 flood.
The only recorded PMF was in WV in the late 1800s. Note that was long before we kicked off global warming by dumping plant food into the atmosphere.