A 30-year-old runner died and 15 others were taken to the hospital after Brooklyn Half Marathon

• A 30-year-old man collapsed and died after crossing the finish line of the Brooklyn Half Marathon.
• FDNY told Insider 15 other people were taken to the hospital, including 4 who were seriously injured.

One runner died and 15 others were taken to a hospital after running the Brooklyn Half Marathon on Saturday amid unusually warm and humid conditions, according to city officials.

An FDNY spokesperson told Insider in a statement Saturday evening that four of the injuries were serious, eight were non-life-threatening, and four were minor. One person refused medical treatment, the spokesperson said.

The runner who died was a 30-year-old man who collapsed just after passing the finish line, The New York Times reported.

It wasn't immediately clear whether his death or the other injuries were directly related to the heat or humidity. The event took place on the same day that officials issued a heat advisory for the New York City area. An air quality alert was also in effect.

During the majority of the race, which began at 7 a.m., temperatures were between the low 60s and the low 70s. Later in the day, temperatures reached the 90s. Saturday was NYC's hottest day of the year so far and was the first time in at least 16 years that a heat advisory was issued in May.

The 13.1-mile half marathon route took participants from the Brooklyn Museum, through Prospect Park, and down Ocean Parkway, before finishing in Coney Island.

New York Road Runners, which hosted the half marathon, had placed medical aid stations throughout the course — including at the finish line, where the 30-year-old runner was treated before being transported to the hospital where he was pronounced dead.