Normal
I burn brush 2-3 x a year. Usually fairly large accumulations. I usually check the wind/weather for several days ahead. What takes a few hours to burn down to coals......hot coals will hide under the ash for several days. A stiff wind could cause leaves etc to blow across and re-ignite. Same could be said for others doing the same thing with trash, etc.....tho' no fire seen it could re-ignite days later.
