The Chicago Marathon is back.

       Last year’s event was canceled — for just the second time in its history — due to the coronavirus pandemic. But many still got their miles in on makeshift courses. The only other time the Chicago Marathon didn’t start was in 1987, when sponsor Beatrice Foods withdrew its support.

       This year, runners should prepare for intense heat as temperatures are expected to peak at 81 degrees, according to the National Weather Service.

       Jake Petr, a weather service meteorologist, said the normal high temperature for Oct. 10 in Chicago is about 65 degrees, putting Sunday well above the norm.

       Chicago Marathon 2021: Route map and tips for spectators and participants — and how to drive downtown (or avoid it) on race day ？

       When the first wave of runners begin at 7:30 a.m., the temperature will be near 70 degrees and will hit the upper 70s around noon when many runners will still be on the course. The start line is located in Grant Park at the intersection of Columbus Drive and Monroe Street.

       Veteran runners still remember the extreme heat that prematurely ended the 2007 Chicago Marathon and sent over 300 runners to the hospital.

       Check back all day for updates from the course. Watch the race live below.

       Catch up on our Chicago Marathon coverage

       A local Marine will run the Chicago Marathon — then fly to Boston for another 26.2-mile race the next day to help raise funds for injured service members ‘I wanted to run with her just to be with her’: A couple is running their 100th marathon together in Chicago Galen Rupp and Sara Hall headline the Chicago Marathon fields as the race returns in October after being canceled in 2020 Read more at chicagotribune.com/chicagomarathon

       Chicago Marathon 2021: Route map and tips for spectators and participants — and how to drive downtown (or avoid it) on race day

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       Watch live: Runners take the course for the 2021 Chicago Marathon — but how will high temperatures affect the race?

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       Chicago Marathon Chicago Marathon 2021: Route map and tips for spectators and participants — and how to drive downtown (or avoid it) on race day

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       Chicago Marathon Watch live: Runners take the course for the 2021 Chicago Marathon — but how will high temperatures affect the race?

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       Horoscopes Daily horoscope for October 10, 2021

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