Bombay Rained Over ! Bombay had the heaviest rain EVER !!!. In a 21 hour period it rained about 38″ inches or 944 mm of rain. Some live accounts of the rain from Bombay Rajesh Jain in Mumbai’s River of Water and Traffic Rahul in Maximum City India Uncut in Streets Like Rivers Dilip D’Souza in Not DD News By arZan ... View all of arZan's posts.