A firefighter watches as a helicopter makes a drop on a wildfire near Placenta Caynon Road in Santa Clarita, Calif., Sunday, July 24, 2016. Flames raced down a steep hillside "like a freight train," leaving smoldering remains of homes and forcing thousands to flee the wildfire churning through tinder-dry canyons in Southern California, authorities said Sunday. (AP Photo/Ringo H.W. Chiu)