The North Rim of Grand Canyon National Park is now closed after a growing wildfire sparked by a lightning strike expanded to more than 8,000 acres and prompted evacuation orders. It comes as soaring temperatures are making it difficult to combat the flames.

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.

Meanwhile, all of Manitoba is under a state of emergency because of the wildfires, which have led to 12,600 people evacuating their homes in the Canadian province.