Urban heat island video for my class

The Weather Channel just posted Science Behind Urban Heat, which I could use in one of two lectures, either urbanization or microclimates.  I haven't decided yet which.

Meteorologist Mike Bettes take a look at urban heat, specifically how highly populated areas can be hotter than less populated areas.

This video almost does a better job of showing the growth of cities and urban population in the U.S. than it does explaining urban heat islands.  I might just use it for the former, then remind the students about it during the latter.  I'll see what I think about it right after July 4th, when I'm planning on giving the urbanization lecture.