Parts of Grand Canyon National Park remained closed to the public Sunday because of wildfires and the release of chlorine gas from a North Rim water-treatment facility, the National Park Service said.

The White Sage Fire near the North Rim of the Grand Canyon has grown to 19,000 acres, prompting evacuations for nearby residents, according to the Bureau of Land Management. As of the morning of July 12, BLM reported the fire had spread to 19,153 acres, with no containment achieved by firefighters.