Where did you get that information? And what's your birth year? must be 1995, or later; right?
Check your resources and double check them whenever in future you are going to provide such data to readers.
15-20 years back, it used to rain weeks and months of continuous rains. It is just that the population is more than doubled now and we are having more economic and human losses than ever. But if we are setting up buildings in rivers and even in the ocean for that matter, who can stop this loss? Everything in India goes unplanned, so the civic structures.