Two fast-moving wildfires—the Dragon Bravo and White Sage fires—have scorched more than 45,000 acres, destroyed the iconic North Rim lodge and dozens of structures, and led to long-term closures in the Grand Canyon.

Wildfires have forced evacuations at two U.S. national parks in the West as summer monsoon storms increase lightning in the region.

'Fridge cigarette' is Gen Z's new Diet Coke obsession that concerns health experts

A water treatment facility at the North Rim had been compromised by the fire, causing chlorine gas to fall to the bottom of the Canyon.

The North Rim was evacuated Thursday because of wildfire and will remain closed for the rest of the season, the park said in a statement.

Wildfires have forced evacuations for visitors and staff at two national parks — Gunnison and the Grand Canyon — in the U.S. as the summer monsoon season brings increased lightning to the arid region.

The fire that burned for days on the North Rim of Grand Canyon before it became uncontrollable was "expertly handled," the National Park Service said.

The north rim of Grand Canyon National Park has now been closed and evacuations have been ordered as a wildfire is spreading. Soaring temperatures are making it hard to combat the flames. NBC News’ Steve Patterson reports.