Wildfire smoke and air quality updates: Northeast flights disrupted
Air quality alerts have been issued for states across the Northeast.
Hazy and dangerous fumes from ongoing wildfires in Canada have engulfed the skies over much of the East Coast, prompting serious air quality alerts in over a dozen states.
Canadian officials said firefighters are scrambling to put out the blazes. So far this wildfire season, Canada has seen more than 8.7 million acres burned -- an area larger than the state of Vermont.
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The forecast
More smoke is expected in the Northeast for the next few days.
The thickest smoke will drift south Wednesday afternoon and is forecast to envelop Philadelphia, Baltimore and Washington, D.C., Wednesday night and Thursday. These cities may see AQI levels reach the most severe “hazardous” level over the next 24 hours.
On Thursday afternoon, another round of smoke is expected to move over Lake Superior and into Cleveland, Ohio; Erie, Pennsylvania; and Buffalo, New York.
-ABC News' Dan Amarante
Why the poor air quality could cause a host of symptoms -- even in healthy people
Exposure to concentrated amounts of fine particulate matter can cause both short-term effects such as irritation of the eyes, nose and throat; coughing, sneezing; and shortness of breath, and long-term effects such as worsening asthma and heart disease, according to the Environmental Protection Agency.
Fine particles are able to enter the body through the eyes and lungs. Not everyone feels the same symptoms, and the pollution can exacerbate existing health issues, such as asthma and allergies, Peter DeCarlo, associate professor of environmental health and engineering, told ABC News.
Click here to learn more.
-ABC News' Julia Jacobo
New Jersey closes state offices early
New Jersey's state offices closed early Wednesday as the air conditions worsened, Gov. Phil Murphy announced.
The governor has urged residents to limit their time outside.
New York City tops list of world's worst air quality rankings
New York City is topping the list of the world's worst air quality rankings by a landslide, according to IQ Air, which monitors air quality worldwide.
New York City reached 392 on the AQI Wednesday afternoon, which is in the worst category -- hazardous -- on the U.S. government’s air quality tracker. Wednesday shattered New York City's record for the highest AQI since records began in 1999.
Dubai and Delhi came in at No. 2 and No. 3 in the world with 168 and 164, respectively.
How to stay safe from wildfire smoke
The most effective way to protect yourself during wildfire emergencies is to stay indoors or limit time outdoors when there is smoke in the air, according to the Centers for Disease Control and Prevention. This is especially important for those with heart or lung conditions who are at higher risk for adverse health effects.
If you can, try to avoid exercising outdoors until the air quality improves, especially those with underlying lung disease.
"People with asthma and people who already have lung disease or underlying lung problems, it can exacerbate that, it can irritate that. And if the air quality is bad enough, it can even cause some symptoms of feeling unwell and respiratory symptoms in people who are healthy," said Dr. Stephanie Widmer, a member of ABC News' Medical Unit.
Pregnant people should also try to avoid spending time outdoors, especially those who are further along, Widmer said.
You should wear a mask that covers your nose and mouth, fits tightly to your face and can filter out smoke or ash particles before you breathe them in, according to the CDC. N95 or P100 masks can help protect your lungs from smoke or ash.
Click here for more tips on how to stay safe.
-ABC News' Nadine El-Bawab and Youri Benadjaoud