Canadian smoke persists over Philly, with a ‘code orange’ air-quality alert

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Canadian smoke persists over Philly, with a ‘code orange’ air-quality alert
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Temperatures are due to climb toward 90 degrees Wednesday, and it's going to get steamier.

Pedestrians ambling in Center City on Tuesday as temperatures climb and veils of smoke fill the air. It's going to get steamier Wednesday.The region is about to get a real summer hors d’oeuvre, complete with an air-quality alert.

With temperatures creeping toward 90 degrees Wednesday and the milky veil of Canadian wildfire smoke persisting over the region, the Delaware Valley Regional Planning Commission has declared a “code orange” advisory for Philadelphia.It is recommending that people with heart, respiratory, and related health issues limit time outdoors. The combination of the warmth and the smoke “will lead to rapid ozone development” during the late morning and peaking in the afternoon, according to the Pennsylvania Department of Environmental Protection.While the skies over Philly continue to look as if they need a good scrubbing, this marks the first air-quality alert since the smoke arrived over the weekend. But this episode in all likelihood will not come close to rivaling the Canadian smoke invasion of early June 2023, when the acrid odorwere flooded with calls reporting fires, said Ray Martin, a lead meteorologist at the National Weather Service office in Mount Holly. At noon Tuesday, the air quality in Philly still was classified as “good,” with ozone the prime pollutant, according to AirNow, a partnership of government and air-quality agencies.The fires in the Canadian woodlands have resulted in the evacuations of thousands of residents. reported that as of Friday more than a million acres of woodland were burning — more than double the average — across the country, the majority in western areas. That has been the source region of the smoke, which has touched off health alarms in several U.S. cities — and a source region of Philadelphia’s cool, dry weather earlier this week borne by winds from the northwest.unlike the June 2023 smoke-outThe smoke generated a rain of “hazardous” particulates that induced schools to go to virtual instruction. Those with background health conditions were advised to stay inside. Trash collections were pushed back, and the Phillies postponed a game.It is unclear when the blue in the sky will return, but the National Oceanic and Atmospheric AdministrationSummery warmth is coming to Philly Temperatures Wednesday are forecast to climb well into the 80s and perhaps flirt with 90 degrees. That would be several degrees above Tuesday’s high; of more significance, however, will be the increase in water vapor in the atmosphere. The dew points, the absolute measures of moisture levels in the atmosphere, are going to shoot up to summerlike levels. Moisture in the air inhibits sweating and makes the body work harder to keep cool.Temperatures during the last two weeks have been significantly below normal in Philadelphia, and premature heat has been scarce. Martin said that people, even in the weather office, have complained in the last few years that spring around here has become the phantom season; how the weatherThat is all the more reason, he said, to exercise a degree of caution come Wednesday.Said Tom Kines, senior meteorologist with AccuWeather Inc., with the taste of summer, “a lot of people are going to be happy. But it’s going to be a shock to the system.”

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