AP photo by Brynn Anderson / Team Penske driver Brad Keselowski puts on his helmet before a NASCAR Cup Series race last Sunday at Atlanta Motor Speedway in Hampton, Ga.

MIAMI — Some fans will be back. Some flags will be gone.

And after an exhausting few days, NASCAR is about to offer another daunting test at Homestead-Miami Speedway. The Cup Series returns to the track for the third time in eight days with Sunday's race at HMS, which has previously hosted NASCAR only in November, when the heat and humidity are less stifling than in June.

"This is kind of making history for the most grueling few weeks on a driver that I think the Cup level has ever seen," said Team Penske's Brad Keselowski, who clinched his 2012 Cup Series title at HMS. "So, you know, with respect to that, it's the same for everybody. I think it's a great test of will. It's a great test to the drivers. I think it's part of what makes these few weeks so compelling, not just as a participant in the sport but as a fan myself."

He was talking about three races in short order during an already-compressed schedule — but really, Keselowski's words could be applied to almost any NASCAR plot point right now.

There's the physical toll that left some drivers woozy when they finished a steamy race last Sunday at Atlanta Motor Speedway, followed by a sticky Wednesday night at Martinsville Speedway, where pit stops included gas for the tanks and in many cases ice packs for the cockpits.

There's also the mental and emotional toll; Bubba Wallace, the only black full-time driver currently on the top-tier Cup Series, has been in the media spotlight like never before after a week when NASCAR banned the Confederate flag from flying at events and his Richard Petty Motorsports No. 43 Chevrolet sported a Black Lives Matter paint scheme that night. And several drivers, Wallace included, severed ties with a popular helmet designer over social media posts largely related to the banned flag.

"There's a lot of support in my corner from all aspects, from sports, from just normal people, people that are wanting to stand up for what's right," Wallace said, when asked to describe a week he described as mentally taxing.

Now, perhaps, a bit of normalcy returns. Fans — albeit a small number, just 1,000, almost entirely military members — will be back in the stands Sunday, the first time anyone has been on that side of the fence for race day since the COVID-19 pandemic era began.

"Yeah, it's great to have people back," Hendrick Motorsports driver Alex Bowman said. "It's been really different. I don't think you really notice how different it is until postrace. Getting out of the cars to almost silence is just a really odd feeling."

As for Sunday?

"Hopefully, we put on a great show and the people that are able to be there at that race are making some noise," Bowman said, "because that awkward silence has been a little weird."

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AP photo by John Raoux / Hendrick Motorsports driver Jimmie Johnson climbs into his car before the Daytona 500 on Feb. 16 at Daytona International Speedway in Daytona Beach, Fla. NASCAR is back in Florida this weekend at Homestead-Miami Speedway, including for Sunday's Cup Series race.

It's the 22nd time the Cup Series will run at HMS but the first time it's happening in any month other than November. Average high temperatures in South Florida are about 8 degrees cooler around that time of year, and forecasters have said Sunday will be like most days at this time of year in South Florida — temperatures near 90, humidity making it feel worse, with potential for thunderstorms.

The on-track temperature will likely be even higher, and drivers are going to most definitely feel it inside their cars. And though no season title is on the line Sunday, there will be a distinct feeling of championship nostalgia for Jimmie Johnson, who clinched all of his record-tying seven Cup Series crowns at HMS.

Track officials are renaming one of the facility's trademarks, the tunnel at turn 3 that leads drivers into the track, in Johnson's honor. The announcement this week was made in part to commemorate what could be his final appearance there. Johnson's plan is for this season to be his last as a full-time driver; last week Atlanta Motor Speedway renamed a grandstand after him.

"It's such an incredible honor to have this tunnel renamed for me," the Hendrick veteran said. "It's going to be weird not driving in there with that familiar pit in your stomach, as I have so many years in the past as we were in contention for championships. So many incredible memories were made at this track. I will always remember how special this place is to me."

Johnson will start ninth, with Joe Gibbs Racing's Denny Hamlin in pole position and joined on the front row by Team Penske's Joey Logano. Keselowski and JGR's Kyle Busch fill the next row, followed by Hendrick's Chase Elliott — which is significant because six of the past seven winners at HMS started fifth or better.

The exception was Johnson, who started 14th in 2016 and won to clinch his most recent title. He hasn't won a race since 2017.