Right, so, mathing it out, the US has a population of around 340 million but Spain has a population of around 49 million. 340/49 is roughly 7, so the per capita equivalent in the US would be a single incident killing 21*7=147 people. So that'd be one incident killing 1.5x the average number of people usually killed across the rest of the country combined.
A completely unremarkable day, more like it. Given stochasticity there's bound to be at least a dozen days per year with 50% more than the average, especially since car deaths depend a lot on weekday, holidays, weather and so on - much moreso than train deaths. No one would look up from it, wouldn't make the news.
> And I think if you math it out with something per capita equivalent, this would actually be an exceptionally bad day/incident for the US.
This is now how I interpreted "bad day", think it would be clearer to remove "day" if that's what you meant. Of course you're right in that it would be awful as a car accident, they simply don't happen that many as a time. Which is why our monkey brain's lack of emotional response to "many small cuts" vs "one big cut" incorrectly causes the belief that cars and e.g. coal/gas are much safer than they are.
0. Per 2024 stats from the NHTSA (https://www.nhtsa.gov/press-releases/nhtsa-estimates-39345-t...)