Ducks in Hard Rain

After a lackluster, wet morning today I got to looking at previous season results. I really can't remember more than a couple of good days in heavy rain. We have had good shoots in light rain, especially when it stops, but I can't really remember more than one or two good hunts in all my years in a steady heavy rain. Anyone here have the same kind of results? I seem to have had best success in flooded fields on days like this maybe because the birds are looking for freshly flooded ground?