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Yeah it's crazy and sometimes it happens when least expected... Like those 19 people that were killed at Huston Mesa outside Payson in 2016. I used to swim there all the time and it never got flash floods... Until a forest fire burned up the brushes and trees up on the rim that had been keeping floods from occuring. No one expected it.

Yeah it is crazy for sure how fast it can move in. It is pretty scary to think about.