How to Safely Evacuate People Quickly From Vulnerable Places

Prading is a natural phenomenon for these rivers which come from the Himalayas. Some will be more severe than others and under era of climate change, they could be very severe winds. So we have to plan for that. In cities, a lot of it is say the land use is already safe built in it. Now in the Yamuna floodplains, you have homes, you have people living there. That's where we have to have, how do you safely evacuate people quickly from these vulnerable places?