The park said along with the fire risk, they could potentially be exposed to chlorine gas after the treatment plant burned.

Dozens of buildings inside the North Rim of the Grand Canyon have been destroyed, including a historic lodge, as a chlorine gas leak has forced firefighter evacuations after the Dragon Bravo Fire exhi...

A wildfire that was burning more than 19,000 acres on Saturday forced the National Park Service to close an access point to the Grand Canyon National Park during the busy summer tourist season, offic...