A code orange air quality alert is in effect on Tuesday for Philadelphia and several nearby counties.
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A code orange air quality alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases, and the elderly.
You can check out the latest Air Quality Index numbers below.
6abc Air Quality Tracker
Meanwhile, there were plenty of tourists being cautious while enjoying the summer sun at the Art Museum on Monday.
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"Yeah, today you can definitely see it in the air but hasn't hurt our trip. Not yet. (It's) hot though. We're from Florida we can handle it," said Michael Kelsey of Pompano Beach, Florida.
Some people say they just hope the winds don't change. They've heard it's even worse to our west.
"I know back in Iowa, where my family is from, they've struggled to go outside. But here, it's not a problem so far," said Jonathan Lindner of Charlotte, North Carolina.
The Canadian Interagency Forest Fire Centre website reported 882 active fires, with 581 deemed "out of control," as of Monday afternoon.
SEE ALSO: Air Quality Index: What do the numbers mean?