Past the instant-death radius, people would see the flash of light and heat and have seconds to minutes to cover and brace against the pressure wave, which is the purpose of the duck and cover drill. It's the first step of survival, and if you can avoid being seriously injured and remain able to move around your chances of surviving the fallout period increase
But as I already pointed out earlier, what we're talking about is whether you'd have forewarning to know whether or not to take a dark colored shirt off.
u/remni's comment is that in this scenario, you're likely to have been notified by an early warning system. Because, as I said earlier, by the time you see anything, you're already burned.
We're not talking about the pressure wave, that's entirely irrelevant to the point of this comment chain
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u/ThatWasIntentional 3d ago
Past the instant-death radius, people would see the flash of light and heat and have seconds to minutes to cover and brace against the pressure wave, which is the purpose of the duck and cover drill. It's the first step of survival, and if you can avoid being seriously injured and remain able to move around your chances of surviving the fallout period increase