I think this is a great point, it would be interesting to hear someone who lives close to the Wyre / that area to give their experiences on this. Reading EvaP, it really resonated on the amount of times i've read people watching people go in, calling for the emergency services for help and still not coming out alive.
Agreed..speak with the older generation of the village, they always know the history regarding all the flooding, local points of interest that need to be considered now in this search, the local fishermen they will have river tales etc. Somewhere embedded deep in the river wyre is where this poor lady is I'm pretty convinced.