Runner's heartbreaking final update video before death as he admits he was 'worried' before last race

A runner who passed away posted a heartbreaking final video the day before his death.

Caleb Graves, who was also a content creator and TikToker, took part in the Disneyland Halloween Half Marathon last weekend.

Graves crossed the finish line at 7am local time but collapsed after suffering a cardiac arrest, the Orange County Sheriff's Department said.

Emergency workers immediately attended to him and transferred him to hospital but he was pronounced dead.

The 33-year-old was an avid runner who regularly competed in half marathons and full marathons and had no underlying health conditions according to Sergeant Matt Sutter.

Graves, who worked as a litigation associate at law firm Wilson Sonsini in the day time, amassed 17,000 followers on TikTok and posted various training and travel videos.

The day prior to the race, he had shared a vlog where he said he was "marginally worried" after becoming exhausted and passing out following a 20-minute dog walk.

Over that weekend in Anaheim, California, temperatures were more than 40°C.

Caleb was from Texas and so was familiar with heat, yet stressed UV rays in Anaheim were "it's own kinda beast".

With the race in the early morning, he was hopeful that the heat would more manageable.

Heartbreakingly, he finished his video by saying he hoped he got through the race.

"The Disneyland Halloween Half Marathon is tomorrow and I'm... marginally worried," Caleb said.

"I went outside today around like, two o'clock which is part of the hottest part of the day.

"It was 97 degrees and there are other places in the country that are obviously hotter, I know people are gonna' say it's not terrible.

"I just passed out, just fell asleep, no control over my body, it was heat exhaustion. It's only happened to me once before.

"I don't what's going on, but I really hope I get through the race tomorrow morning!"

It is not yet known whether the heat was a factor in Caleb's death, with the Orange County Sheriff's Department and coroner's investigation still ongoing.

Jessica Good, a Disneyland Resort spokesperson, issued a statement saying: "We are deeply saddened by this tragic loss, and our hearts are with Caleb's family and loved ones during this difficult time."