[@Metal Tortoise]
I do not think you understand what a megaton is.

Fat man and little boy, the two nukes that destroyed two cities.

Weren't even a single megaton put together.

Together, the liberal estimate of their combined tonnage is 40 kilotons.

Which is 1/25th of a megaton.

Ignoring the simple matter of the pressure wave, the radiation and heat from a single megaton is enough to kill pretty much anything instantly. If someone were to punch with the force of a megaton, they'd erase a few city blocks behind whatever they were punching. Simply by virtue of the pressure wave.