They are calling it a 500 to 1000 year event. There are floods in drainage plains, but very rare to have everyone affected at once.
they have reported the Big Thompson was higher this time than when it flooded in 1976, killing 150 or so.
this time add in boulder creek, south boulder creek, four mile creek, clear creek, left hand , St vrain, platte, and poudre.
Coal Creek Canyon is also a mess. Probably months to get the roads rebuilt.
**They are calling it a 500 to 1000 year event.***
We got flooded in Tulsa, OK back on Memorial Day back in 1976. It was a one in one hundred year flood.
Nine years later, Tulsa was again hit on the same day, another one in one hundred year flood.