Thanks for the link. When I worked in Gold Beach, OR in the late 70s, there were still some markers on various buildings showing the highwater level of the Rogue River during the floods.
We lived up on a hill outside of Orick. We had a house full of people staying with us.
We have those all over in Florida. Especially along the rivers like the Suwannee. We had one we put on our house back in 2008. We could have rowed a canoe in our house. Talk about fast moving people trying to get furniture and electronics up off the floor! Ever try to lift a full length couch with recliners on both ends up two feet onto cinder blocks? Ain’t easy! We had 8” of rain in a 45 min. period and we didn’t live in a flood zone... we just happen to be the lowest piece of land in the neighborhood.