Does the government (or a private organization) investigate or track the causes of deaths due to severe weather ... kind of like the FAA tracks the causes of airplane accidents?

I'm wondering what the leading causes of that kind of death are ... and I'm not talking about the kind of weather ... I'm talking about what they might have done - or not done - or what conditions other weather might have existed - or not existed - to put them at risk.

Watching the news regarding Joplin, Missouri (SAD!!!) I wonder how many deaths are related to ....

--failure to seek shelter (sirens not soon enough?, sirens ignored?)
--failure to have an adequate shelter (maybe the areas are not suitable to basements?, maybe buildings are not strong enough, ...)
--on the road and not seeking shelter
(I'm sure there are others)

To be clear: I'm not putting it all on the poor folks who have been hurt or worse. I'm more looking for lessons learned for those of us lucky enough not to have been impacted by such severe weather .... so far.