Excessive heat warnings and heat advisories are in effect for most of the Chicago area until 9 p.m. Friday.
Heat advisories and excessive heat warnings are in effect for Thursday and Friday.
Sky gazers willing to be outside looking after 2 a.m. in the coming days may get a glimpse of shooting stars, especially in darker areas.
"Very muggy" conditions are expected Wednesday through Friday, with Thursday looking the hottest.
The World Air Quality Index said Chicago​ had the fourth-worst air quality in the world on Tuesday.
​The weather service said it is "watching Wednesday's set-up for potential of severe thunderstorms."
The "most uncomfortable" weather will likely come late next week.
An air quality alert remains in place on Monday before the hazy and smoky conditions move out and mostly sunny and dry conditions take over.
Storms could move through northeast Illinois and northwest Indiana Friday afternoon and evening.
Three tornadoes were EF-1, while eight were EF-0, or the lowest on the scale.
Several tornado warnings have been allowed to expire, but a tornado watch remains in effect until 10 p.m. for the Chicago area.
The weather service said storms are likely to develop across parts of northern Illinois along a cold front on Tuesday afternoon.
There is a threat of severe weather on Tuesday afternoon, and on Wednesday.
Storms are possible, but severe weather is not expected Friday night.
Storms are possible between 3 and 10 p.m. Wednesday.
Isolated storms are possible Monday afternoon, but storm coverage won't be significant.
The watch is in effect until 5 p.m. Thursday.
A stormy weather pattern is also expected to start Wednesday, with possibly severe weather on Thursday.
​As of 7 a.m. Tuesday, air quality is already at unhealthy levels.
The week will start cooler and rainy on Monday, before temperatures climb back into the 90s by the end of the week.
The chance of rain and storms will increase Saturday night, continuing through Monday.
People with pulmonary or respiratory disease should limit prolonged outdoor activity, the weather service said.
The next chance of rain won't be until this weekend.
Set your alarm for an early wake-up Saturday to see a rare planetary alignment of Saturn, Neptune, Jupiter, Uranus and Mercury.
Despite moderate to severe drought conditions across Illinois, forecasters are only predicting an 11 percent chance of rain in coming days
After cooler, rainy days, the rest of the week looks warmer and sunny.
There is also an elevated fire weather risk, and a high swim risk on Monday.
Weather will turn cooler and rainy on Sunday, and a chance of rain continues into early next week.
Here in the Chicago area, there are no air quality alerts, although alerts have been issued for the St. Louis area near the IN/IL border.
In Illinois and the Great Lakes, "hotter than average temperatures are most likely."
After an air quality alert due to wildfire smoke, Illinois air was deemed"acceptable," as other states see smoky haze, unsafe air quality.
The air quality alert remains in effect through Monday night.
Concertgoers for Taylor Swift's shows in Chicago won't have to worry about rain in the forecast, as it will be dry all weekend.
Storms are expected between noon and 8 p.m., and will be "slow moving pop-up type thunderstorms," the weather service said.
Isolated storms are possible on Wednesday, Thursday and Friday.
The dry pattern could continue into early June.
The weather service said a cold front will lower temperatures on Wednesday through Friday, especially in northeastern Illinois.
Rain on Friday will be the last for a while, as temps in the 80s are expected next week. After smoky skies, sunshine is expected in IL.
Illinois looks to remain near average temperatures for most of the summer, according to the outlook.
A cold front will drop temperatures from 80 to 50 near the lake on Tuesday. Most of the rest of the week will be seasonable weather.