In light of the release of Oppenheimer, people have been talking about, basically, the other side of the development of atomic weapons. John Hersey's "Hiroshima" article from the August 23, 1946 edition of the New Yorker came up as the definitive piece on the immediate impact of the dropping of the bomb on Hiroshima, and it is a gripping read: https://www.newyorker.com/magazine/1946/08/31/hiroshima
Ugh. Clearly the author was paid by the word. That's painfully super stretched out writing. :( Couldn't even make it a 10th of the way through that without losing all interest and moving on.
This one genuinely, truly is not. Take the first section: every vignette is tightly constructed; you get a sense of the person, the zeitgeist of fear they were living in, and the arbitrary moment that made All The Difference. This structure is repeated point-by-point for each of the survivors, deliberately, to hammer home each element.
Part II has its own structure, emphasizing the chaos. Each part flows well from one to the next. The entire article is an excellent example of writing. It's clear that the author himself is grappling with what to feel about it all. It's powerful stuff.