Core Insights - The wildfires in the western United States, particularly in Arizona and Utah, have escalated significantly, with Arizona's Grand Canyon National Park experiencing a "major fire" status and becoming one of the largest wildfires recorded in the state [1][2] - The Arizona wildfire, ignited by lightning on July 4, has burned nearly 453 square kilometers, with only 8% of the fire contained as of August 1 [1] - Utah has declared a state of emergency due to wildfires affecting multiple towns and causing power outages [1] Summary by Sections Arizona Wildfire - The Grand Canyon National Park wildfire has reached a major fire classification, marking it as the largest wildfire currently burning in the U.S. [1] - The fire has destroyed the historic "Grand Canyon Lodge" and at least 70 other structures [1] - Control efforts saw a temporary increase to 26% but were hindered by worsening weather conditions, leading to a significant drop in containment [1] Utah Wildfire - A wildfire in Utah, which started on July 13, has burned approximately 225 square kilometers [1] - Evacuations were ordered for several towns affected by the fire, and power facilities were damaged, resulting in outages in southern Utah [1] - Utah's governor declared a state of emergency on July 31 due to the ongoing wildfire situation [1] Fire Season Outlook - The National Interagency Fire Center has warned that the wildfire season in the western U.S. is far from over, predicting high wildfire risks to persist at least until September [2]

Core Points - A wildfire in Arizona's Grand Canyon National Park is currently out of control, with only 4% of the fire perimeter contained as of July 31, and over 105,000 acres (approximately 425 square kilometers) have burned [1][3] Group 1 - The wildfire was ignited by a thunderstorm on July 4, and factors such as dry vegetation, strong winds, and high temperatures have exacerbated the situation [3] - A time-lapse video captured on July 29 shows smoke from the fire forming a massive "pyrocumulus" cloud, which can lead to severe weather phenomena such as storms, lightning, and even tornadoes [3] - Local emergency management teams have warned that the smoke could spread to nearby areas, posing serious health risks, and have advised residents in areas with poor air quality to stay indoors and consider wearing N95 masks if they must go outside [3]