Operations manager Ted Melden displays one of six emergency sheds serving his town.   Teresa Mathew

If disaster ever descends on Dillon Beach, residents and visitors will have food for several days—dehydrated packets of pasta marinara, pinto bean stew, vegetarian chili—that Ted Melden, operations manager of the Dillon Beach Emergency Response Team, calls “a five-star restaurant without the five stars.” 

The team, founded 11 years ago by a handful . . .