I was a big fan of the 3e "environment" books such as Stormwrack, Sandstorm, and Frostburn—adventure settings in which the extreme environments presented major obstacles or threats to life, and dealing with survival in those environments was a significant focus.
There was a lot to like about them, e.g. Sandstorm: ~10 pages showing the effects of extreme temperatures, things like:
At 141-180 degrees F, PCs must make Fort. (DC 15, +1 per previous) check every 10 minutes or take 1d4 points of non-lethal damage
and adjudicating the effects of dehydration; descriptions of different kinds of desert environs (Badlands, Salt Flats, Petrified Forests, &tc.); table describing the effects of sandstorms and whirlwinds etc; "flavor" components for how the extreme conditions of various deserts might affect different races; etc.
They generated many exciting hours of adventures. What setting/adventure content exists for D&D 4e that fits into this environmental challenge category? Have any of these 3e books been updated into the 4e rules, for example?