Hi, There is no point visiting Rann in August since there is no white desert during that time and its quite hot an humid. If you wish to admire the beauty of white desert, visit Rann any time between November - February. Here is how you can plan your trip:
https://www.tripoto.com/trip/gujrat-rann-of-kutchh-and-more-5a68cda494ed7 Happy Traveling :)