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A Code Orange Air Quality Alert is in effect for much of Southeastern Pennsylvania on Sunday, including Bucks, Chester, Delaware, Philadelphia and Montgomery counties, according to the Pennsylvania Department of Environmental Protection.

The Code Orange Alert is due to the expected sunny skies, light winds and high temperatures reaching 90, according to the DEP.

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Wildfire smoke is also playing a part in the Code Orange, officials said.

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The air quality is expected to be at its worst in the afternoon on Sunday, officials said.

During a Code Orange Alert, sensitive

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