The Pinkertons wanted me to picture myself in a scene of absolute devastation. “A hurricane just wipes out everything, and you need to feed your children,” Andres Paz Larach said. The power grid is down, shipments of food are cut off, the water is no longer potable — how do you get what you need to survive? What risks do you take? It was a hot early morning in March, and we were driving through a pine forest high in the mountains surrounding Santa Ana Jilotzingo, 25 miles northwest of Mexico City. Our Suburban, equipped with bulletproof windows and reinforced doors, labored slowly over the dirt road, which appeared to…