Visitors and staff at two national parks in the U.S. West have been evacuted because of wildfires. Officials at Black Canyon of the Gunnison National Park in Colorado say the park closed Thursday morning after lightning sparked blazes on both rims.

Fast-spreading wildfires have forced the evacuation of part of the Grand Canyon, with the US National Park Service saying at least 500 people had been guided out of the danger zone. "Last night, Grand Canyon staff safely evacuated approximately 500 guests,