Typhoon Yagi Leaves at Least 4 Dead in Vietnam

Water is whipped up by high winds onto the shore of Phuong Luu lake as Super Typhoon Yagi hits Hai Phong on September 7, 2024. (Photo by NHAC NGUYEN / AFP)
Water is whipped up by high winds onto the shore of Phuong Luu lake as Super Typhoon Yagi hits Hai Phong on September 7, 2024. (Photo by NHAC NGUYEN / AFP)
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Typhoon Yagi Leaves at Least 4 Dead in Vietnam

Water is whipped up by high winds onto the shore of Phuong Luu lake as Super Typhoon Yagi hits Hai Phong on September 7, 2024. (Photo by NHAC NGUYEN / AFP)
Water is whipped up by high winds onto the shore of Phuong Luu lake as Super Typhoon Yagi hits Hai Phong on September 7, 2024. (Photo by NHAC NGUYEN / AFP)

Vietnamese authorities say Typhoon Yagi has killed at least four people and injured 78 others after making landfall Saturday afternoon in the north of the country.
Yagi, described by Vietnamese meteorological officials as “one of the most powerful typhoons in the region over the past decade,” made its way to the Southeast Asian country after it left three people dead and nearly a hundred others injured in the Chinese province of Hainan.
The typhoon landed at Vietnam's coastal provinces of Quang Ninh and Haiphong with wind speeds of up to 149 kilometers per hour (92 miles per hour), state media reported. Before landing, strong winds felled a tree, killing a woman in the capital, Hanoi, local media said Saturday.
Quang Ninh is home to the UNESCO World Heritage site Ha Long Bay, known for its many towering limestone islands. Hundreds of cruises were canceled at the popular site before the typhoon landed, according to local media. Haiphong is an industrial hub, home to large factories, including EV maker VinFast and Apple supplier Pegatron.
The typhoon has also triggered power outages in large parts of Quang Ninh and Thai Binh provinces.
Earlier, the government issued several alerts, and those vulnerable to floods or landslides were evacuated. Four airports were shuttered, including in Hanoi, and Haiphong.
Authorities pruned trees in Hanoi to make them less susceptible to falling, but wind and rain knocked over several along with billboards in northern cities. Local media reported that many moored boats were swept out to sea.
On Friday afternoon, Yagi struck the Chinese city of Wenchang in Hainan province with wind speeds of up to about 245 kph (152 mph) near its center. Authorities said the typhoon left three people dead and nearly a hundred others injured in the province. It has affected over 1.2 million people as of noon Saturday, according to the local Global Times newspaper.
Some 420,000 Hainan residents were relocated before the typhoon's landfall. Another half a million people in Guangdong province were evacuated before Yagi made a second landfall in the province's Xuwen County on Friday night.
Meanwhile, the meteorological observatory of the city of Haikou downgraded its typhoon signal from red to orange on Saturday, as it moved further away.
Before leaving Hong Kong, Yagi forced more than 270 people to seek refuge at temporary government shelters on Friday, and over 100 flights in the city were canceled due to the typhoon. Heavy rain and strong winds felled dozens of trees, and trading on the stock market, bank services and schools were halted.
Yagi was still a storm when it blew out of the northwestern Philippines into the South China Sea on Wednesday, leaving at least 20 people dead and 26 others missing mostly in landslides and widespread flooding and affecting more than 2.3 million people in northern and central provinces.
More than 82,200 people were displaced from their homes in Philippine provinces, and classes, work, inter-island ferry services and domestic flights were disrupted for days, including in the densely populated capital region, metropolitan Manila.

Typhoons are becoming stronger, fueled by warmer oceans, amid climate change, scientists say.
Last week, Typhoon Shanshan slammed into southwestern Japan, the strongest storm to hit the country in decades.
Yagi is named after the Japanese word for goat and the constellation of Capricornus.



Fire Tornadoes are a Risk Under California's Extreme Wildfire Conditions

The National Weather Service warned Tuesday that the combination of high winds and severely dry conditions have created a “particularly dangerous situation”  - The AP
The National Weather Service warned Tuesday that the combination of high winds and severely dry conditions have created a “particularly dangerous situation” - The AP
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Fire Tornadoes are a Risk Under California's Extreme Wildfire Conditions

The National Weather Service warned Tuesday that the combination of high winds and severely dry conditions have created a “particularly dangerous situation”  - The AP
The National Weather Service warned Tuesday that the combination of high winds and severely dry conditions have created a “particularly dangerous situation” - The AP

As if they aren’t already facing enough, firefighters in California also could encounter fire tornadoes — a rare but dangerous phenomenon in which wildfires create their own weather.

The National Weather Service warned Tuesday that the combination of high winds and severely dry conditions have created a “particularly dangerous situation” in which any new fire could explode in size. The advisory, which runs into Wednesday, didn’t mention tornadoes, but meteorologist Todd Hall said they're possible given the extreme conditions.

 

A look at fire tornadoes according to The AP.

What is a fire tornado? Fire whirl, fire devil, fire tornado or even firenado — scientists, firefighters and regular folks use multiple terms to describe similar phenomena, and they don’t always agree on what’s what. Some say fire whirls are formed only by heat, while fire tornadoes involve clouds generated by the fire itself.

The National Wildfire Coordinating Group’s glossary of wildland fire terms doesn’t include an entry for fire tornado, but it defines a fire whirl as a “spinning vortex column of ascending hot air and gases rising from a fire and carrying aloft smoke, debris and flame,” and says large whirls “have the intensity of a small tornado.”

Wildfires with turbulent plumes can produce clouds that in turn can produce lightning or a vortex of ash, smoke and flames, said Leila Carvalho, professor of meteorology and climatology at the University of California, Santa Barbara.

“There is a rotation caused by very strong wind shear and a very hot, localized low-pressure system,” she said.

What is a fire tornado capable of? Fire tornadoes can make fires stronger by sucking up air, Carvalho said. “It creates a tornado track, and wherever this goes, the destruction is like any other tornado.”

In 2018, a fire tornado the size of three football fields killed a firefighter as it exploded in what already was a vast and devastating wildfire near near Redding, about 250 miles (400 kilometers) north of San Francisco in northern California. Scientists later described an ice-capped cloud that reached 7 miles (11 km) into the air and caused winds up to 143 mph (230 kph).

Research also suggests fire tornadoes can carry airborne embers, also called firebrands, over long distances, said James Urban, an assistant professor in the Department of Fire Protection Engineering at Worcester Polytechnic Institute. They also can change the fire’s behavior, he said.

“That’s also something that is dangerous and scary for first responders, or really anyone,” he said. “It can change and maybe go in a different direction.”

The interaction between wind, the fire plume and topography determines whether a tornado will develop, he said. For example, sometimes a certain topography will restrict airflow in such a way that a spiral pattern develops.

Can you make one in a lab? Together with San José State University, Worcester Polytech is part of a Wildfire Interdisciplinary Research Center. In the lab in Worcester, researchers have created small fire tornadoes by putting up walls around a fire or arranging a bunch of little fires that together restrict airflow. But that’s on a much smaller scale than what’s happening with the wildfires.

“We’ve got the biggest fire lab in the US for a university, but we cannot get something the size of what’s been reported at these fires,” he said. “You can’t really bottle that and put it in a lab.”