PHOENIX — Historically dry conditions have combined with gusty winds to make it harder for crews to get a handle on a wildfire burning along the North Rim of the Grand Canyon, causing containment figures to plummet as the blaze nearly tripled in size in just a few days. Crews had managed to contain about 26% of the Dragon Bravo Fire last week, but that dropped into single digits as unfavorable conditions helped the flames to spread across more than 110 square miles (about 285 kilometers) by Tuesday The fire made one of its biggest runs on Monday as it raced across 25 square miles of terrain. The periods when the fire is most active is spanning longer durations of the day, leaving less time for firefighters to make up ground, fire spokesperson Lisa Jennings said.