First of all the question is that will there be a nuclear blast in future anywhere in this world, certainly yes at some point of time it will happen.

Second point is that even if you dont do anything, natural force always act upon at some point of time to bring a balance.

The human population has gone up so high that they have mercilessly exploiting the nature and the environment and at some point of time it will be counted upon by the nature.

So be it a nuclear blast or natural calamity, something worst is going to happen in future.