The park initially was managing it as a controlled burn but then shifted to suppression as it rapidly grew to 7.8 square miles because of hot temperatures, low humidity and wind, fire officials said....

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...

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