Isn't the population density there such that a lockdown might not have the same effect it did elsewhere?
Edit: 29th ranked, behind Hong Kong, South Korea, but ahead of most other newsworthy COVID hot spots. I suspect large Indian cities are well above 29th.
"It seems this virus propagates much better in cold weather."
This hasn't been confirmed, but I've seen quotes from various professionals saying it is at least likely, and the distribution of cases certainly makes it feel true.
It's nice to hope that, but the virus doesn't seem to be struggling to spread in warm places. Curves in southern California, Louisiana, Australia are all following the standard trajectory.