The Valley Fire began on September 12, 2015, and spread to 76,000 acres in Northern California’s Lake, Sonoma, and Napa counties before it was extinguished weeks later. Four people died, and nearly 2,000 buildings, including 1,200 homes, were destroyed.
SMOKE HANGS IN THE BRANCHES of Douglas firs massed on the ridge line. On most days, Randy and Lori Dunn, who live just below it, can see the ragged palisade clearly. But on this September day in Napa County, the trees are indistinct, receding farther as the day progresses and the sky darkens. By 7 P.M. it is black, and although the fire is still a dozen miles away, the smell is inescapable.
The Dunns close the windows, turn on the air conditioner, and go to bed. At 2:30 A.M., they…