Efforts to contain a large wildfire in southern Idaho by Sunday evening were dashed as winds picked up and the region’s grass and sagebrush provided readily available fuel for a blaze estimated at 117 square miles. But conditions improved elsewhere in the West, helping crews gain ground on wildfires in Colorado and Utah. The fast-moving fire west of Twin Falls, Idaho, was first spotted Saturday afternoon and grew to 75,000 acres within 24 hours. The wildfire initially threatened a handful of homes near the hamlet of Roseworth, 25 miles southwest of Twin Falls, but winds shifted and moved the blaze north.