How to protect yourself from the bad air caused by Canada's wildfires

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How to protect yourself from the bad air caused by Canada's wildfires

2025-06-05 04:54 Last Updated At：05:01

Plumes of smoke are blanketing large swaths of the U.S. and parts of Europe, which presents risks for those breathing it.

The Midwest, Northeast and Great Lakes regions of the U.S. have “very unhealthy” air quality, according to the Environmental Protection Agency, and experts say people should take precautions.

The EPA's Air Quality Index converts all pollutant levels into a single number. The lower the number, the better.

Anything below 50 is classified as “healthy.” Fifty to 100 is “moderate" while 100-150 is unhealthy for “sensitive groups,” and anything above 150 is bad for everyone. The Air Quality Index was around 160 in many parts of the Upper Midwest on Wednesday.

Sensitive groups include people with asthma, lung disease or chronic obstructive pulmonary disease, said Dr. Sanjay Sethi, chief of the division of pulmonary, critical care and sleep medicine at the University of Buffalo's medical school.

“If you have heart or lung problems, then you’ve got to be definitely more careful," Sethi said. "I would either avoid going outside or wear an N95 (mask) or at least a dust mask.”

Sometimes the air is bad enough to see or smell the smoke. Even if you don't see the pollution, it can be unhealthy to breathe.

The EPA maintains a website with up-to-date, regional air quality information. PurpleAir, a company that sells air quality sensors and publishes real-time air quality data, has a citizen scientist, air quality monitoring network with a more granular map of street-by-street air quality readings.

The best way to get indoor air quality readings is to buy a monitor, said Joseph Allen, director of Harvard University's Healthy Buildings Program.

“You can find these low-cost, indoor air quality monitors just about everywhere online now. They don’t cost all that much anymore,” he said.

For most people, going outside for just a short time won't have a negative long-term impact, said Sethi.

Wearing an N95 mask, which became common during the coronavirus pandemic, will help filter out the pollution.

“N95 is going to get rid of 90-95% of the particles,” said Jennifer Stowell, a research scientist at Boston University’s Center for Climate and Health. “If you have access to a mask that has a respirator-type attachment to it, then that’s the very best.”

If you must be outside and you experience symptoms, experts say you should head indoors or somewhere else with better air quality. Even if you are healthy, it’s good to take precautions.

"If you start wheezing, which is like this whistling sound of the chest, or if you’re feeling short of breath, that’s definitely more concerning,” Sethi said.

Close the windows and turn on the air conditioner, if you have one, setting it to circulate the indoor air. Use blankets to cover cracks that allow outside air into your home, such as under doors.

Finally, swapping the air conditioner's filter for a MERV 13 filter can help, though you should make sure it's installed correctly.

“If you happen to have access to an air purifier, even if it’s just a room air purifier, try to keep it running and in the room that you’re doing most of your activities in,” said Stowell.

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Venezuela's government accuses US of attacking civilian, military installations in multiple states

CARACAS, Venezuela (AP) — Venezuela’s government accused the United States of attacking civilian and military installations in multiple states after at least seven explosions and low-flying aircraft were heard around 2 a.m. local time Saturday in the capital, Caracas.

The Pentagon and White House did not immediately respond to requests for comment.

Smoke could be seen rising from the hangar of a military base in Caracas. Another military installation in the capital was without power.

People in various neighborhoods rushed to the streets. Some could be seen in the distance from various areas of Caracas.

“The whole ground shook. This is horrible. We heard explosions and planes,” said Carmen Hidalgo, a 21-year-old office worker, her voice trembling. She was walking briskly with two relatives, returning from a birthday party. “We felt like the air was hitting us.”

Venezuela’s government, in the statement, called on its supporters to take to the streets.

“People to the streets!” the statement said. “The Bolivarian Government calls on all social and political forces in the country to activate mobilization plans and repudiate this imperialist attack.”

The statement added that President Nicolás Maduro had “ordered all national defense plans to be implemented” and declared “a state of external disturbance.”

This comes as the U.S. military has been targeting, in recent days, alleged drug-smuggling boats. On Friday, Venezuela said it was open to negotiating an agreement with the U.S. to combat drug trafficking.

Maduro also said in a pretaped interview aired Thursday that the U.S. wants to force a government change in Venezuela and gain access to its vast oil reserves through the monthslong pressure campaign that began with a massive military deployment to the Caribbean Sea in August.

Maduro has been charged with narco-terrorism in the U.S. The CIA was behind a drone strike last week at a docking area believed to have been used by Venezuelan drug cartels in what was the first known direct operation on Venezuelan soil since the U.S. began strikes on boats in September.

U.S. President Donald Trump for months had threatened that he could soon order strikes on targets on Venezuelan land. The U.S. has also seized sanctioned oil tankers off the coast of Venezuela, and Trump ordered a blockade of others in a move that seemed designed to put a tighter chokehold on the South American country’s economy.

The U.S. military has been attacking boats in the Caribbean Sea and the eastern Pacific Ocean since early September. As of Friday, the number of known boat strikes is 35 and the number of people killed is at least 115, according to numbers announced by the Trump administration.

They followed a major buildup of American forces in the waters off South America, including the arrival in November of the nation’s most advanced aircraft carrier, which added thousands more troops to what was already the largest military presence in the region in generations.

Trump has justified the boat strikes as a necessary escalation to stem the flow of drugs into the U.S. and asserted that the U.S. is engaged in an “armed conflict” with drug cartels.

Meanwhile, Iranian state television reported on the explosions in Caracas on Saturday, showing images of the Venezuelan capital. Iran has been close to Venezuela for years, in part due to their shared enmity of the U.S.