The next year, we had a flood that was worse...
Oh I remember that one. I was in it in Novato, California. Only time in my life I've been in a minor flood. I had to open the side door, as well as the garage door itself to reduce the amount actually trying go through the house.
Had a few neighbors patrolling the street in canoes and row boats.
Found one of my plastic bins around 60# full of iron and steel tools across the street the following day.
That's as close as I ever want to be to a real flood.
Most regular people have no clue about statistical statements which can't remain static. Earthquakes, volcanoes and floods never have a regular schedule.
For example, if a flood occurs every 200 years exactly the "recurrence interval" is 200 years.
If a similar flood occurs once, then not again for 700 years, but four years in a row, the "recurrence interval" becomes also 200 years.
So saying "another one is now due" becomes meaningless.