FLAGSTAFF, Ariz. — Fire crews battling a pair of wildfires in northern Arizona were expecting some growth Thursday because of warm, dry and breezy conditions, but rain that could help quell the blazes is on its way. Both blazes were moving through grass, brush and pine trees on the northern outskirts of Flagstaff, a mountainous city that’s home to Northern Arizona University and the observatory where Pluto was discovered. It’s also a popular respite from the sweltering heat in the low deserts, including Phoenix. The larger fire has burned more than 38 square miles (100 square kilometers), destroying one home and another structure. It was 27% contained Thursday, down slightly from a day earlier because of burnout operations, fire information officer Mike Reichling said. …Multiple states had early starts to the wildfire season this spring. Climate change and an enduring drought have fanned the frequency and intensity of forest and grassland fires.