There was a time that FEMA said that they were getting out of the trailer business and would not be using that option again. But time, necessity and the demands of providing temporary housing have kept them in the game. The most notorious issue that FEMA experienced with trailers followed Hurricane Katrina — which the story alludes to.
The problem with trailers is what to do with them after their immediate use is completed. Trailers (anyone who owns a travel trailer can tell you) easily develop water leaks and our national penchant for not maintaining anything will be sure to bite us in the butt again in the future as trailers are put back into storage, waiting for the next big disaster. Then, another scandal — probably with mold inside the trailers will be in the headlines.