There is no place to hide, from nuclear radiation.

There is no place to hide, from a direct hit, from a nuclear missile.

There are not enough medical clinics, mobile hospital units, or hospitals, to support more than 50,000 sick or injured people.

There is not enough radiation medicine, for 1 million people.

There are not enough decontamination units, for 1 million people.

There is not enough storage space, for more than 50,000 bodies.

What exactly, is the shelter-in-place plan, or the evacuation plan?

The US Military, would have to send all of its Pearl Harbor Fleet, as far out into the Pacific as possible, to avoid Pearl Harbor 2.