WAWONA, Calif.—A fast-moving brush fire near Yosemite National Park exploded in size Saturday into one of California’s largest wildfires of the year, prompting evacuation orders for thousands of people and shutting off power to more than 2,000 homes and businesses. The Oak Fire started Friday afternoon southwest of the park near the town of Midpines…

WAWONA, Calif.—A fast-moving brush fire near Yosemite National Park exploded in size Saturday into one of California’s largest wildfires of the year, prompting evacuation orders for thousands of people and shutting off power to more than 2,000 homes and businesses. The Oak Fire started Friday afternoon southwest of the park near the town of Midpines…