Firefighters responding to the Dragon Bravo Fire on the North Rim in Grand Canyon National Park earlier this month reported that the North Rim water treatment facility had caught fire. It was later confirmed that chlorine gas was released from the facility.
Chlorine gas is heavier than air and can quickly settle into lower elevations such as the inner canyon, posing a health risk. Due to the risk of exposure, park authorities evacuated firefighters from the North Rim and hikers from the inner canyon, and closed access to specific areas within the inner canyon.
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The Southwest United
