The report says "Chicagoans are more likely to suffer from itchy eyes, runny noses and sneezing."
Due to winter frost sticking around, tree budding is occurring later than normal this year.
The fog is likely one of the few things you'll actually be able to see Tuesday.
Chicagoans stepped outside to enjoy the above-average temperatures Friday.
The warm weather will stick around Saturday but take a dip Sunday, weather officials said.
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