Wildfires burning at or near the Grand Canyon's North Rim are still raging as strong winds, high heat and low humidity persist.

Arizona officials are pressing for an investigation into the National Park Service's handling of the Dragon Bravo Fire, which spread after being managed as a controlled burn.

Republic photographer Michael Chow captured the wildfire in a time-lapse video taken July 14 from the Canyon's South Rim. Chow set up his camera on a tripod, pointed it at the smoke, hoping it cleared at some point and and shot a photo every four seconds for 4 1/2 hours.

Fire activity on the North Rim of the Grand Canyon has forced the closure of several trails and campgrounds. Meanwhile, life goes on at the South Rim where tourists endured a smokey visit Monday.

The White Sage Fire, burning in northern Arizona near the destructive Dragon Bravo Fire, continues to grow with evacuations still in place.

A wildfire destroyed a historic lodge at the Grand Canyon's North Rim and some political leaders want to know if the fire was mismanaged. One fire expert said officials should approach policy changes carefully because controlled burns are still critical to forest health.