Griffith Park, LA, CA fire via Lienna Jael.
Missouri Valley 2007 flood image by Fiddelke.
Greensburg, Kansas tornado image by Hope City.
It’s been an elemental trifecta of disaster: fire, water and air, all covered nicely by citizen media online.
* Fire (Griffith Park, Los Angeles, CA) on Flickr. Also excellently done at Metblogs LA, Laughing Squid, and a follow-up on Boing Boing.
* Flood (burst levees along the Missouri River) on Flickr.
* Twister (Greensburg, Kansas) on Flickr.