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]
美国大峡谷国家公园山火仍在肆虐，上空腾起巨大“火积云”
Huan Qiu Wang·2025-08-01 00:47