Jeff Graham is preparing for another long, hot East Texas summer. He’s tending to the okra and cantaloupe in his vegetable garden on his plot of land in Log Cabin, a city of fewer than a thousand people seventy miles southeast of Dallas. He’s planted apple and mango seedlings. He’s even set up a small greenhouse for herbs. Fourteen-year-old Justin, the third of four Graham boys, has a sophisticated plan for catching catfish in Cedar Creek Reservoir from the public docks at the end of Alamo Road, one of the main arteries—and one of the few paved streets—running through the town. The Grahams are working to ensure they can make it through this summer without having to choose between electricity and food, like they’ve occasionally had…