The super fire in California formed the "fire tornado".

  Last week, the mountain fires that started in Mojave National Nature Reserve in California intensified, spanning two states, and even formed an extremely dangerous weather phenomenon "fire tornado".

  This fire is called "York". CNN pointed out that this is the biggest fire in California this year. As of August 2, local time, the fire has burned more than 80,000 acres of land.

  This fire is just one case of frequent fires in the United States under continuous high temperature weather. According to the National Inter-departmental Fire Center of the United States, as of the end of July, with the continuous hot and dry weather, there were 64 fires in nine States this year, and 1.1 million acres of land were burned.

  The trajectory of fire tornado is difficult to predict.

  Although "fire tornado" sounds like a term in science fiction, it is a real natural phenomenon.

  On July 28th, local time, the fire started burning in Mojave National Nature Reserve. On the 30th, the wind increased in high temperature and crossed the state line into Nevada. Just in recent days, when firefighters tried to put out the fire raging on the border between California and Nevada, they found a burning vortex in the fire.

  "Firefighters on the north side of the fire observed' fire tornado'." Mojave National Nature Reserve posted on social media that although these natural phenomena are interesting to observe, they are actually very dangerous phenomena, usually occurring during wildfires.

  On August 1, 2023, local time, a wildfire spread in the Mojave Desert in California, USA, and a "fire tornado" appeared in the fire. Figure/vision china

  According to the introduction of Mojave National Nature Reserve, "fire tornado" refers to a cyclone formed by high temperature and strong wind, which looks like a "high-speed rotating pillar of fire". CNN pointed out that as the air heated by the fire rises, cold air will quickly flood into the space where the original hot air is located, thus forming a flame cyclone and sweeping smoke, debris and flames into the sky.

  It can change its direction suddenly, making its trajectory difficult to predict, and it can also accelerate or decelerate quickly, ranging in size from several feet to several hundred feet. "fire tornado" can spread the burning embers far away from the original fire site, and create a new fire, which also brings extremely dangerous conditions for firefighters' activities.

  In the records of the Library of Congress, "fire tornado" can also be called "firenados" or "fire tornados". Jason Forthofer, a firefighter and mechanical engineer at the Missoula Fire Science Laboratory of Montana Forest Service, said, but generally speaking, the latter is an "enhanced version" of fire tornado, which is comparable in size and scale to ordinary tornadoes.

  In 2018, a fire named "Carl" on the outskirts of Reading, California triggered a destructive "fire tornado", which killed eight people and razed several houses. The deadly fire has a wind speed of more than 140 miles per hour, which is equivalent to an EF-3 tornado.

  In recent years, the number of reports about "fire tornado" has surged. Fossoff pointed out that it is not clear whether this is because more people have the conditions to record these weather phenomena or because rare weather events are becoming more and more frequent.

  "fire tornado" makes it difficult to carry out fire control work.

  Firefighters fighting the "York" fire in California are facing the continuous high temperature. After the emergency rescue by the fire department, as of noon on August 2, 30% of the fire has been controlled. However, the fire is still spreading rapidly, and the dangerous "fire tornado" makes fire control more and more difficult.

  At present, firefighters have been injured at work. According to the National Public Broadcasting Corporation (NPR), the authorities said that firefighters facing the "fire tornado" face great risks, and they must carefully plan and implement safety protocols to minimize potential hazards.

  York, which spans California and Nevada, is just one of the fires in the United States. Almost at the same time, an out-of-control wildfire named Eagle Cliff also spread from Washington State to Canada, burning thousands of acres of land on both sides of the border.

  According to the National Inter-departmental Fire Center of the United States, as of the end of July, with the continuous hot and dry weather, there were 64 fires in nine States of the United States this year, and 1.1 million acres of land were burned. More than 11,500 firefighters and other personnel have been assigned to various fire accidents.

  On July 30, 2023, local time, firefighters were putting out the fire in Mojave National Nature Reserve, California, USA. Figure/vision china

  Experts say that frequent wildfires are caused by the combination of dry vegetation and a series of recent heat waves. Earlier, the World Meteorological Organization and Copernicus Climate Change Service, the European Union's climate monitoring agency, announced that the first three weeks of July this year were the hottest three weeks on record, and July this year is likely to become the hottest July on record and the hottest month on record.

  With the arrival of August, the wildfire season in the United States may continue to accelerate. CNN pointed out that most parts of the Pacific Northwest are dry and hot, which is expected to last all summer, laying the foundation for wildfires that are easy to spread.

  In the long run, record-breaking high temperatures are part of the global warming trend. The World Meteorological Organization predicts that at least one year in the five years from 2023 to 2027 will break the high temperature record set in 2016, with a probability of 98%.

  Under this circumstance, UN Secretary-General Guterres warned that "the era of global warming is over, and the era of global boiling has arrived" and urged immediate and decisive action to reduce emissions that cause global warming.

  Beijing News reporter Ruoruoxi Luan

  Editor Zhang Lei proofreads Chen Yuyan.