‘Taking a shower’ in India can mean anything from just that, to dipping in the river, pouring water over oneself with a bucket & ‘dipper’ (a small plastic jug), using any available standpipe, or even rain puddles!
While poor people can often be seen ‘taking a shower’ in the open air, it is never in the nude. Indians are extremely modest, and if they are likely to be seen, will always bathe wearing trousers, a sari, or at least their underclothes.