Levee breaches from Hurricane Katrina dumped six feet of water into the New Orleans home of Mary Duplessis and her husband in 2005. The house was uninhabitable. Rebuilding meant piles of paperwork in a mountain of bureaucracy. She didn’t return to the city for a year. But as the 15th anniversary of the storm approaches, and as another monster storm narrowly missed the city, it’s not memories of Katrina that weigh on Duplessis’ mind. It’s the coronavirus.