Here in these parts, we have had several severe storms,extreme in my opinion ( I work 20 mins from this site), in theses areas an inch of rain in an hour can cause a creek,river, to rise several feet quite rapidly,hence "Flash Flood"...this is a very common thing in our area,as for this specific location I can't be sure because I wasn't there to witness it.but I can say from 47 years of experience of living in this area, a rise in water level in a creek or river from inches to feet in a matter of hours is quite common,and has occured several times in the past 2 months,just my experience&opinion,nothing more