It's also not a "U.S." thing since fire codes and enforcement are usually a county by county basis and not inspected or enforced on a federal level.
Though most all urban areas have enforcement, many smaller areas do not.
Though most all urban areas have enforcement, many smaller areas do not.
If it’s unsafe, they can close the business until the issues has been resolved.
I wouldn’t call it heavy enforcement, and it’s not perfect. People die in commercial fires not too infrequently in the US.
https://www.chicagotribune.com/suburbs/aurora-beacon-news/ct...
https://cbs4indy.com/2019/04/29/messy-aisles-causes-speedway...