Comment by titzer

This is the problem. It's not just being in the area, it's inhalation/ingestion and direct exposure to radioactive dust. If you look at [https://www.dhs.gov/sites/default/files/publications/Quick%2...], the levels just from increased radiation from a single detonation there are certainly not fatal in a few minutes, but with multiple detonations it's not difficult to get a lethal dose in a few or hours or a day or two. Couple that with the inhalation/contamination issue, and yeah, be afraid.

If I saw that sign I'd be a hell of a lot more concerned than "oh, miniscule cancer risk later in life, meh, I guess I'll just slowboat this one".