For all the typical jokes about US construction, fire safety shouldn't be one of them. We use and mandate drywall with specific fire-ratings, which is very effective at stopping fire from spreading. Our electrical code is one of the strictest in the world and many areas mandate sprinkler systems. Smoke and CO detectors are just a no-brainer, given how cheap they are.
Overall, fires don't register on people's list of dangers very highly (or at all) over here, and that's even with many apartments having gas burners for heating up water or even entire apartments. I've seen a couple of carbon monoxide dectors (people are afraid of gas stoves malfunctioning), but I've yet to see a smoke detector in Poland. BTW the overt attention to fire codes is one the first things I noticed when visiting the US.
I've seen some raging fires in concrete buildings.