Alex WellersteinVerified account

A nuclear attack is a little more than a “radiation emergency.” Just saying... Not sure Go Inside, Stay Inside, and Stay Tuned is the best advice for 20kT (or 200kT) incoming.https://twitter.com/NNSANews/status/1040285990538158082 …

It actually does work out a lot better than any alternatives one might consider, at least according to all of the models that have been run.

I think one has to take into account the fact that they can't say, "obviously a lot of people would just get killed." That's not really in their vocabulary for a lot of reasons, though they all know this.

With that out of the way, you have to look at ways of limiting the preventable casualties. Being inside is better than being outside by a LONG shot, both for the initial effects (blast, heat, acute radiation), and DEFINITELY for the delayed effects (fallout).

Absolute worst-case scenario in all of these models are people trying to haplessly flee the area, either before or after, and clogging the roads. Cars give no protection from anything, and clogged roads hinder all emergency activity.

And I think most people don't realize that even a very crappy shelter (protection fact or of 3 or so) can put a big cut in the amount of radiation you absorb over the crucial 36 hours or so of the first, intense fission products.

(And the "Stay Tuned" is meant to indicate that in some cases, evacuation MAY be a better idea, but it is going to depend on a lot of circumstances that individual people aren't going to be able to evaluate on the fly.)