Hi, George,
I think the real trouble spot is that arroyo after the Italian ruins at Italica and before Guillena. There has been a lot of agitation to get a bridge built, but no success so far. When the flooding is a problem, though, the road alternative is well marked.
The other spots I remember from my Camino were before and after Fuente de Cantos. I had to take off my boots to wade across, but it was no more than knee high, and not dangerous. I am not aware that these spots are ever deep enough to require a detour.
It's also a problem limited to spring, when I walked in May, the worst was over. When will you be walking? Buen camino, Laurie