E L D, a.k.a. "egyptoid," is a Red Cross volunteer via the Southern Baptist Convention. In "Confessions of a Yellow Hat" he summarizes what he's been doing:
After Katrina hit the Gulf Coast, my boss let me go on extended leave of absence to assist those in need. Not having Red Cross training, and not wanting to go by myself or with a government group left me with few avenues to approach. Since I didnt know where exactly to go, how, or who to help, I linked up with the experienced deacons from my church, men who had been into the aftermaths of previous hurricanes, especially the four that hit Florida in 2OO4. [...]
The Red Cross has large tractor-trailer rigs, with specially modified trailers that expand into mobile kitchens. One is called “Spirit of America”. But there’s only a few of them. When disaster spreads on major areas, such as Katrina hitting a 4OO mile wide swath from Port Arthur Texas to Mobile Alabama; more of these feeding units are needed than even the mighy ARC can cover. Several years ago the idea hatched for the SBC to make their own kitchens. These run in a fashion similar to the Red Cross types, with some methods borrowed from military-style portable kitchens. The Army and Air Force can drop in just about anywhere in any conditions and feed 500 people on 6 hours notice, so there’s lessons learned from them. So different churches and sections of the SBC have different “units”, with a variety of jobs to perform.