Wildfires are burning in the boreal forests of central Canada, causing fires in Toronto and sending smoke across the border into Detroit, Chicago, Minneapolis and New York. Flash flooding has inundated parts of the Texas Hill Country, a year after flooding killed more than 130 people in the same region. California’s Sierra County is burning. Washington DC. Battling a heat index near 40 degrees Celsius. And about 64 million Americans were battling both high temperatures and dangerously polluted air as of Thursday, according to the U.S. Weather Prediction Center, part of the National Weather Service.
Officials from Minnesota to New Jersey have urged residents to stay indoors, distributed KN95 face masks, and canceled and postponed outdoor events — including a Major League Soccer (MLS) match in Chicago, municipal swimming pools and nature camps in Minneapolis, and a Creed concert at the Mystic Lake Amphitheater near downtown.
Detroit recorded the worst air quality of any city in the world on Thursday, according to monitoring firm IQAir, with a pollutant index (AQI) of 600 – twice the level classified as hazardous by the US Environmental Protection Agency (EPA), Reuters reported.
Behind the overlapping crises are a persistent drought across much of North America, a stalled high pressure system that has trapped the smoke close to the ground, a jet stream spreading the Canadian smoke into the Southeast, and a warmer atmosphere that holds more moisture and dumps it as extreme rainfall. Scientists say each of these has become more likely as global temperatures rise.
where is the smoke coming from
Most of the smoke blowing across the US Midwest and Northeast originated in Ontario and other parts of central Canada. As of Thursday morning, 858 wildfires were burning across Canada, 111 of which were considered out of control, according to government data. Most were in the central provinces of Manitoba, Saskatchewan and Ontario.
About 5.9 million acres – about 2.4 million hectares – is burn Across Canada so far this season. The Ontario government has asked Ottawa to prepare help for the evacuation of remote communities in the north, including the possible deployment of Canadian troops, Bloomberg reports. Ontario Provincial Police said 15 communities and their surrounding areas had already been evacuated.
Northern Minnesota is contributing its own smoke. About 17 fires started by lightning more than a week ago in the Boundary Waters Canoe Area Wilderness – an expanse of 1.1 million acres (445,000 hectares) mostly accessible by canoe – have spread rapidly, the Associated Press (AP) reports.
Rangers estimate that 6,000 to 10,000 people were inside the forest when it was closed on Tuesday. Most of them had been evacuated by Wednesday, although some campers had to paddle for hours between the rising walls of fire. The Royal Canadian Air Force also airlifted 11 teenagers and four staff members from a provincial park north of the border to Minnesota.
“The landscape will remain burning through the fall, and some fires will continue to burn until snow covers them,” Karen Harrison, a spokeswoman for state and federal agencies coordinating the response, told the AP.
A high-pressure system trapped the smoke close to the ground, with visibility down to half a mile in places, said Steven Freitag, an NWS meteorologist in Detroit.
Minnesota’s northeastern Iron Range, including the cities of Duluth and Hibbing, recorded concentrations of fine particles as high as 900 micrograms per cubic meter — more than three times the limit for hazardous air, according to the state’s pollution control agency.
Chicago’s air quality index rose above 300 on Thursday, the reading at which the EPA classifies the air as “hazardous” for everyone regardless of health status.
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heat
At this time of summer, temperatures have been unusually high in large parts of the country. Temperatures in Minneapolis were forecast to exceed 32°C for the rest of the week.
In many cities, temperatures remained below forecasters’ earlier predictions due to wildfire smoke.
Frank Pereira, a senior branch forecaster at the U.S. Weather Prediction Center, said previously expected record-breaking temperatures in the mid-Atlantic had not fully materialized. “It will definitely still be hot, but not at the same intensity as we were experiencing before,” Pereira told Bloomberg.
flood in texas
In central and western Texas, the story was water. Flash flooding destroyed bridges and closed dozens of highways between San Antonio and the border city of Del Rio, mandating evacuations throughout the hill country.
Bloomberg reported that 9 inches (23 cm) of rain fell in some places in a matter of hours and that 8 inches of rain was expected by Friday morning. Some areas could see as much as 30 inches (76 cm) of rain in 72 hours, said Hatim Sharif, a professor at the University of Texas at San Antonio who studies flash floods.
Texas Governor Greg Abbott declared a disaster in 59 counties and deployed more than 1,300 emergency workers. More than 75 people had been rescued as of Wednesday night, and one person died during a rescue effort in Travis County, KEYE-TV reported, citing a county spokesperson.
The Guadalupe River, near which more than 25 girls and staff members were killed at a summer youth camp last July, rose 32 feet (9.8 meters) in four hours, the NWS said in a social-media post. Two camps along its banks – Camp Waldemar and Camp Stewart – said all campers and counselors were safe. A camp run by the Children’s Association for Maximum Potential was providing shelter in place. The Leona River was also in spate near Uvalde.
Deaths have declined compared with last year’s disaster because early-warning systems have been enhanced and people have become more cautious about camping near Hill Country rivers, said Philip Bedient, a Rice University engineering professor who founded the university’s Severe Storm Prediction Center.
Bedient said, “These are very fast-moving rivers and once you’re swept away, of course you’re at a loss. But having said that, I still think there’s a lot more awareness now than there was a year ago.”
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Scientists have been warning about a pattern
About 47% of the United States is affected by drought. So is much of eastern and western Canada. A warmer atmosphere leads to more moisture, which leads to heavier rainfall, and more evaporation, which dries out vegetation and provides fuel for wildfires. Scientists call threats that occur simultaneously or one after another as “mixed events.”
“At this point it’s basically a river of smoke flowing across the Midwest,” said Emily Fisher, an atmospheric chemist and professor at Colorado State University.
“This is a direct link to climate change. This is the climate change that people breathe,” he said.
Dan Westervelt, an associate professor at Columbia University’s Climate School, described the combination of severe drought and heat in Canada and the US as “a perfect storm for really dry conditions to provide a lot of fuel for these wildfires to burn.”
The overlap of heat and smoke creates complex health risks.
“Extreme heat is expected during this season, but what’s new in the context of climate change is actually extreme heat and wildfire smoke simultaneously. We have to get used to it because it’s not going to be extraordinary anymore,” said Tarik Benmarhania, a professor of epidemiology at the University of California at San Diego.
A study published this year found that long-term exposure to fine particles from wildfire smoke caused an average of 24,100 deaths per year in the lower 48 US states.
Question on FIFA World Cup final
Dangerous conditions have emerged in the New York metropolitan area just a few days ago. fifa world cup final The match between defending champion Argentina and European champion Spain is to be held at the open-air stadium in New Jersey on Sunday (local time). More than 80,000 spectators are expected at the venue and more than 50,000 at a public screening in Central Park, Manhattan.
Air quality in New Jersey was rated “unhealthy for sensitive groups” by multiple monitoring platforms. The rain forecast for Saturday will largely offset the smoke, with cooler air expected to blow in Sunday morning, AccuWeather meteorologist Alex DaSilva told Reuters. “It should take out the remaining smoke that we’re seeing,” DaSilva said.
Despite the expected relief, medical experts said the combination of residual smoke and heat could pose a risk until the 1500 Eastern Time (1900 GMT) kickoff. “It’s not only going to be terrible, terrible air quality. It’s hot, and that can cause extreme stress on the heart,” said Dr. Vin Gupta, a pulmonologist and member of the American Lung Association’s board of directors.
Gupta said hydration breaks would need to be more than twice the number provided at every game and suggested that immunocompromised fans consider selling their tickets and watching from home. He said fans with health issues who decide to attend must wear masks in the stadium.
