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Those living their daily lives in cities like Chicago and other areas around the Great Lakes were asked to wear masks or stay indoors when possible.
Air quality in the Upper Midwest region of the U.S. dropped to harmful levels in cities like Chicago and elsewhere in the Great Lakes region, as harmful smoke from persistent wildfires in Canada continued to drift down into that part of the United States.
Meteorologists observed how in less than 24 hours, the Chicago skyline transformed from relatively clear skies on Monday, to a thick brown and gray haze blanketing the city by Tuesday.
In nearby Milwaukee, the air quality index jumped above the 250 mark into the "dangerous" level, reaching an AQI of 266 by Tuesday afternoon.
That "dangerous" marker was applied to localities in Michigan and in northern Indiana, as residents were asked to stay indoors or wear a mask while outside, when possible.
Residents and visitors who are older or suffer from heart or lung disease were asked to be especially cautious until the AQI improved. Chicago health officials asked that people avoid extended time outdoors, and strenuous activity while outside.
Chicago Mayor Brandon Johnson said, "As we work to respond to the immediate health concerns in our communities, this concerning episode demonstrates and underscores the harmful impact that the climate crisis is having on our residents, as well as people all over the world."
It has been Canada's worst year for wildfires since it began keeping records on the blazes. In Canada's eastern Quebec province, fires have been burning for weeks.
Meteorologist Jon Erdman, who lives in Wisconsin, said, "I couldn't see a hint of blue sky outside my front door Tuesday morning, and the smoke smell is as strong as I can recall from other Canada smoke episodes in recent years."
The UK's Met Office reported that Canadian wildfire smoke had drifted across the Atlantic and entered UK airspace and on into parts of western Europe.
Experts there said the smoke was staying high up into the atmosphere, which would mostly just change how sunrises and sunsets appeared to those on the ground.
You probably felt it: The number of people who say they've personally experienced direct effects from climate change jumped this summer.
The storm made landfall near Emerald Isle at 6:15 a.m. on Saturday with winds close to 70 mph, later subsiding to 40 mph.
Customers in Seattle have been asked to conserve water due to continuously dry conditions in the state of Washington.
Carter is celebrating his birthday seven months after entering hospice care. He is the oldest-living former president in U.S. history.
Matt Gaetz, a Republican congressman in Florida, has been a longtime nemesis of House Speaker Kevin McCarthy.
Customers with the new iPhones have complained that their devices become too hot to touch in some instances.