The fire department can do surprise inspections of businesses to insure they are complying with fire codes.
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...