Whenever weather goes extreme and is in the news every day (2 feet of snow in /nyc, flooding in Texas, tsunamis and the like) it always makes me think about integrating such into an RPG adventure. Instead of heroic acts killing the bad guys, it's heroic acts saving the common folk.
Now, part of the problem with implementing that is that earlier editions of D&D and it's clones really stressed combat. Sure, and argument can and will be made that ealry editions were all about the money and the expo and avoiding combat was usually more effective than engaging in it. While that might be true, I've never played in or run a session for a group that wasn't eager to engage in combat. Stealth be damned, half the group is usually wearing chain mail or better anyhow.
Of course, since D&D has it's roots in wargaming, none of this is a surprise.
With all that out of the way, how would you integrate weather as an adversary in your campaign? How do you make them heroic without the incentive of gold and combat? Fight the ogre tribe or rescue peasants from flood waters?
I know you can use extreme weather as obstacle, but my desire is use it as something that will bring out noble, or at least, decent deeds from the PCs.
Throw some thoughts my way.