I've been in the parks when it down poured (once it was freezing) and we tried to tough it out but even with ponchos we were soaked from head to toe. We had to go back to the room and change so we did some resort shopping and grabbed food while waiting for it to blow over. Generally when it rains and we don't get soaked we shop, go on indoor attractions (waiting in line isn't do bad when it's pouring outside), or grab some food