Houston is imfamous for not having zoning. That's how you get an industrial plant next to a school next to a mall next to housing next to a cattle feed lot.
Given how zoning utterly ratfucked half the west coast into being all single-family hellscapes; I'm not inclined to say Houston should start having American-style zoning codes. Zoning goes way beyond safety regulation and includes all sorts of things that should never have been brought under democratic control. If we want to keep housing from being built next to polluting factories, then that should be the EPA's job[0] to enforce.
I wouldn’t be surprised if the other places didn’t have similar features. Responsible zoning, imho, would put residential far away from industrial, especially when they have smoke stacks or other offgasing.
[0] or local state equivalents